The answer is quite simple, you suck at keeping buffs and debuffs up. So less asking us to analyse you and do some research yourself.

I have to admit I came to this conclusion after only looking at the Ignis fight in your log, I chose Ignis as it's just a simple tank and spank. Your self buffs and debuff uptimes are shocking.
To save you a bit of time have a look at a post I made in the Cat logs thread, I don't want to repeat what I typed there as it was quite time consuming the first time. The last three paragraphs of this post will provide you instructions on how to analyse your performance, the rest is up to you.

Zarelis

(1) Use Classtimer to track your Rip, Rake and Savage Roar uptimes.

(2) If you still suck, use FeralByNight to help you with your rotations.

Three things I look at in my World o Flogs analysis. Look at 'Details for Zarelis' and on the 'Buffs cast' tab and look at your Savage Roar uptime % on the 'Buff' table (should be at minimum above 80%). Also look at your Rip and Rake (and if you are a Mangle b!tch, then your Mangle uptime %) on the 'Debuff' table. 60% would be a good goal to shoot for when looking at your Full Report, and more like 80% when looking at the Bosses total.

The Badkitty mod is also good for helping you get into your groove.

I was wondering if anyone had any thoughts on kitty dps for 25 man heroic Anub. I am currently in danger of losing my raid spot and am really not sure what I can do to improve my dps. I seem to be tops on the meter during the first two add phases before the burrow but after, during the scarab phase, my dps plummets. Any help would be greatly appreciated.

here is a log

World of Logs - Real Time Raid Analysis

Right off the bat your savage roar uptime is low, and it appears to be dropping at the times you're worried about your dps. Swipe on the scarabs is often going to be pretty inefficient as well, if you aren't hitting 3-4 at a time swiping is pretty poor DPE.

Anub is quite specific fight. From your log it seems you are AoEing burrowers primarily, which in my opinion is wrong approach. I tried focusing on AoEing the adds down, but i always fell behind on damage and i dont think our AoE is competitive at Anub. It CAN be competitive if you are lucky with OOC procs, but if you are not - you are screwed.

I focus on Anub, and i use Berserk and OOC procs to swipe the adds if i can manage to keep bleeds up on Anub at the same time. The fight then goes like this:

Pull: start rotation on anub
1st pack ready for AoE: berserker + swipe and at the same time keeping bleeds/SR up on anub
2nd pack ready: i ignore 2nd pack, it gets finished in kite phase, focus on anub
<kite phase>
anub emerges: start rotation on anub
3rd pack: swipe if you have spare energy / OOC procs, but focus on anub
4rd pack: same as 2nd (at this point you have berserk ready, but the timing is not good for effective usage)
<kite phase>
anub emerges: start rotation on anub
5th pack: berserk + swipe + keep bleeds on anub
<time goes on>
x-th pack: swipe if you have spare energy / OOC procs, but focus on anub
another berserk ready: use depending on situation
anub dies (well i havent seen this yet )

Using the above, i am reliably top damage on anub. My overall damage varies greatly depending on OOC procs when adds are up, and also if you are kited / chased or not. Check e.g.:

World of Logs - Real Time Raid Analysis (lucky on OOC)
World of Logs - Real Time Raid Analysis (lucky on OOC)
World of Logs - Real Time Raid Analysis (unlucky)

Note: I use Tiger's Fury to make sure i berserk with full energy.

Point out that over the course of the night you were 10th on damage to Anub and 9th on damage to the Burrowers. It would be ridiculous to sit someone for lack of damage to the Swarm Scarabs, unless you have a raid-wide problem of people watching the kite and not killing them. As for dps during that phase your best bet is probably just to keep up SR and run around mangling any adds you see, with the occasional swipe if you get a group of 3-4 adds clustered together. Shred and rake are mostly useless since they die so quickly and won't be properly debuffed.

Interesting, Inaiwae. I wonder using that strat (only swipe when you have a lot of energy and don't need the CPs/OOC proc/berserk) whether using 2pT8 would be more beneficial assuming you don't have insane gear otherwise. Having those extra OoC procs will net you something like 2x swipe damage on adds, and you can prioritize keeping rip and rake up on Anub'arak since you're on him the whole time.

If all you want to do is top damage then make sure you can put up a 5 point savage roar just before adds are at tank(s) and that you have high energy once they are there. Then swipe. Any excess combo points/energy can be spent on a normal rotation but main focus is not having to refresh roar while adds are alive. I switch out shred glyph for berserk glyph and my damage breakdown looks like this
Swipe 56.3%
Melee 27.5%
Shred 6.2%
Rake 4.1%
Rip 3.6%
Mangle 2.2%

I didnt do math, but i just wasnt satisfied with my AoE so i switched to the above tactics. As i wrote above, it depends a lot on OOC procs. If i get no OOC procs during pack (happens often enough to matter), my AoE was sub-par (my average Swipe hit for 6400, so thats 3200/4.5 secs = 7100 dps + autoattack on anub). I didnt like the randomness, so i switched more to single target dmg with supporting swipes as described.

I think that feral druid single target dmg is one of the highest in game, while the AoE capacity is just average, so i leave AoEing to classes that are better suited to that and only support them during berserk time and OOC procs. If i notice we are behind, i of course switch to full-AoE or even single target on adds that are too high (happens occasionaly).

About the importance to kill adds - i think as long as the adds die before next pack comes, it is ok. If you can manage that while using strong single-target classes for Anub mainly, it is better than all people AoEing.

If anyone has different experience / opinion, i'd be interested to see parses for comparison.

To be honest i have problem keeping stuff up effectively without either 4t8 or 2t9, even with mangle bot. I suppose its just after long time with 4t8 i am a bit spoiled, and need to get used to it. But it may be worth testing, i still have 2t8 in bank.

I completely forgot about Hysteria, thanks for the tip.

Note that the good try you linked contains 4 waves, of which 2 under berserk. Full fight contains 9 waves of adds, of which 3 are under berserker. So long-term your damage will be lower. Impressive damage nevertheless .

Btw, i am quite puzzled by DK's ability to be top AoE and top single target dmg at the same time (see my parses).