I've been gone from WoW a pretty long time. Right around the time our guild got Reg 25 LK I had to take an extended leave. I just came back like last week, so I've been reading up as much as I can on the changes to Ret and there seems to be a lot so I was just going to dump a few questions hoping i was right

With 4.0 coming up most likely next tuesday, we have to drop all agility gear (Finally...) Switching my ring to Might and what not. I've read that the inscribed ametrine's will no longer give max dps, and we will have to switch to str - haste?
From what i have read haste becomes kind of the gg stat in Cata (Str > Hit > Expertise > Haste > Mastery > Crit)

Apparently also Hit and Expertise capped ratings are changing, apparently it's like 1000 hit and 500 expertise now from what some of my friends have been saying on the PTR, which seems insane but with all the increased stats on items in cata i Guess i could see it

Yes, one clarification, the increased hit/exp requirements are on beta at 85, not on ptr at 80. Additionally, it is good to note that all arp on on gear is going to become crit, unless the item has crit, in which case it will be come haste, probably. Specifically this greatly improves the value of DBW and STS. Also, TaJ seems to have lost value, probably due to less proc-able actions occurring, i.e no DS w/seal proc and no RV procs, this could also affect Bryntroll.

There are also numerous changes to rotation, an almost complete revamp.

With AP going away, I assume the 2H enchant Massacre is also gone. Any word on what is best to replace it with?

all elemental damage besides stormstrike,windury and lava lash?

All elemental damage, stormstrike and windfury are both physical damage, lava lash is affected. Though I think there was a problem with the Flame Shock ticks, not sure if it's still the case or if it even was a problem with the mastery.

AP on gear is going away but I don't think they intend to remove all existing AP enchants, especially since in many cases that would require replacing them with 2 enchants (one with agility and one with strength). Last I checked on beta massacre was still there. There don't seem to be any new melee enchants from the Cata recipes designed for hunters right now, hopefully that gets fixed.

under enhancement tree:

Totemic Reach: increases the range of your totems effects by 15%

Does this include increasing the range of Searing totem by 15%? If so, how many yards are 15%

(I don't think i should post this here, if so, please delete it, and sorry about that)

I want to ask something related to the next patch changes (and not directly to cataclysm).
Which spec we should use as level 80 with tier 10 gear?
Does our dps (and healt pool) will increase as tier 10 80 death knights going from 3.3.5 to 4.0.1 (like it always happens in pre expansions period)?

I'm sorry if my questions sounds a bit annoying but we have 2 months before cataclysm,and a lot of guilds (like mine) has not finish the content,and a lot of death knights out there want to know what exactly a frost death knight will be in the next two months.

Disappointed to read that.

I do not understand what the priority status is now if critical replaced Arp. Agi again be a priority gem? And Hit and Haste? How is the order of priorities when it needs more gemmate for good dps? Agi our Crit > Hit > Haste > etc....

I'm consistently getting higher numbers for DW Frost in UPres.