Sadly no, there's a grand total of one on the server at the moment.
The patch toned down the gene splicer packs a little so hopefully we'll see more people running the instance in heroic, but the drop rate seems quite low.

I've definitely taken a crit from Zereketh in shadow resist gear (sitting on about 400 defense) Cleared botanica about 3 times so far, no staff.

365 shadowresistance is how I do pandemoneous. Its really the only way. And even then it takes a good healer and fast reflexes on the escape button to avoid attacking his dark shell. Having a hunter along makes him much easer tough, as they can nuke him trough the shell, which means he is way more likely to die before /oom Also note that since all damage is shadow you can shift out, innervate your healer, and barkskin + tranquility while tanking

The instance really isn't that hard, and you might find it rather easy to motivate hunters to come along with you, because of the nice epic boots. It's still quite hard to farm that instance, since mechenar just gives that much more badges/hour, while being that much easier.

I offtanked Gruul today, and my aggro generation while doing so was close to if not slightly greater than what it was before. The rage generation increase wasn't huge but it helped and was noticeable. I was using the new KTM during our attempts, it has new bear threat values and seemed very accurate.

Basically, lacerate is GOOD now. I even dug my crappy idol of ursoc out of the bank. Get used to using it and wean yourself off maul/swipe spam.

Bears are still good maulgar tanks, I don't have THAT much less hp and they didn't nerf the AOE avoidance part of predatory instincts. Durid tank with grace of air and a moroes trinket = free break for the healers during whirlwind, heh. Good old feral charge is still nice for his enrage too.

However despite this good news I've been kind of wrapped up in my warrior alt lately. Intervene and thunderclap in defensive stance, combined with being able to get conc blow in an MS build has revitalized my interest in the class. I didn't like how warriors tanked compared to druids before but now they're a lot more fun.

I'm pretty sure our hunters all have either the Chess or Nightbane boots, so I'm out of luck with that. Part of the problem is that all the TK instances drop the same loot as in normal mode, except the end boss, and as botanica is quite long people would rather do things like Underbog and Slave pens, which are both much shorter, much easier, and drop some rather ridiculous things (quagmirrans eye for one thing, every caster seems to want that and for good reason).

Actually, with the revised threat for lacerate, the idol of ursoc is practically useless.

Threat for lacerate works as so:
Initial application - 25-35 damage or so, causes about 280 threat for the application. The damage then adds on top of that with a multiplier of x0.2. This means you get ~5 more threat from that up front application.
Ticking it deals (155/6)*1.25 = 32 damage or so per stack. With the idol of ursoc you get ~4 more damage per tick, per stack, with mangle on. That means you generate (with 5 stacks) -> 4*5 * 0.2 = 4. So you end up with 4 more threat per tick, per stack. Doesn't seem very amazing does it? This means every 6 seconds (mangle cooldown) you get 8 extra threat with this idol. It's pretty much guarenteed, while mangle isn't because of dodge/whatever, but it's still close to useless.

However if you still have the Idol of the Wild, it adds 45 damage to mangle. Assume about 20% reduction for armour (unless you're fighting Aran its about right with sunders/etc), and you get ~35 damage extra, which with 50% extra threat because of the mangle multiplier is an extra ~53 threat per 6 seconds.

Over a fight like gruul which is 7-8 minutes long you're looking at a (practically guarenteed)
~385 threat extra from the idol of ursoc, while with the mangle idol you're looking at ~2500 more threat (ignoring crits and parrys/dodges because they'll probably about balance out). Neither are exactly game-breaking, but that extra threat from a mangle crit at the beginning can help you edge out some enhancement shaman being slightly too eager with windfury crits.

I have some crafted leather and cloth armor, along with the Karazhan AR trinket. I get my arcane resistance up to around 300 and the mobs don't do much damage to me, at all. The tough part is that they drop aggro so easily. They're vulnerable to stuns and other types of CC (frost nova), plus, they waste a lot of time casting spells. They would be far more dangerous if they only used melee attacks.

I have never been crit by these guys, so I'm not sure if they can crit, but even if they did, I resist 50-75% of their damage (on most of their attacks), anyway.

I'm very interested to hear others' takes on the 5-on-5 arena scene, too, since last week's changes.

Here's my contribution to the discussion:

In 5-on-5 arenas, my role is usually one of crowd-control. A typical fight starts with me stealthed in kitty form targeting a healer. Then it goes pounce->maim->cyclone->cyclone->cyclone. Then I shift into beaR form, bash, and feral charge the healer as he/she heals. Ideally, by then, the others in my group have taken out at least one of their players.

Basically, I'm the annoyance in the arenas. It varies from group to group, naturally, but that's what I've found to be the most effective so far.

As kind of some background info, my build is a PVE tanking/DPS one, and I typically rock a 4p Moonglade among other gear while I PVP.

*Edited for typos

Yeah moonkin can OT fine in normal. I think in heroic about the best you can do is take a couple hits before the MT picks it up off you if they're slow grabbing the cyclone release.

As a tank, I can tell you the strat that my 5 man group came up with for these guys:

I go into cat form, a hunter holds aggro on him while kiting, a rogue stunlocks (I help with pounce and bash), and I shred.

I dunno, I can still crush a rogue without shifting out of bear form, and some other classes without shifting out of cat. My gear is reasonably good (YAY Terestian staff!) but I took out a rogue in < 10s today (in the middle of enemy-controlled Halaa) who has the Kazzak sword and Fireguard, so...