I have only raided once on Chew since the patch so I don't have an awful lot to add other than these few points:
1. As Belara says, theorycrafting is pointing towards a Hit Cap>Agi>Mastery>Crit>Haste stat priority. Problem is that currently, unless you have loads of each stat (full 277 gear) its a REALLY difficult choice which stats to drop, and more importantly, how much. No-one is sure what lvls of each stat is optimal and, as there's no spreadsheets available yet, it's mostly trial and error for now >.<
2. Movement severely gimps your dps now. Especially as your steady shots now a). provide you with your resource; and b). give you a really nice 8% haste buff if 2 are fired in succession (therefore almost essential). So, while I have always (and continue to) favour crit over haste, I can't dismiss the idea that it is POTENTIALLY better than crit, because it should reduce the crippling effect of movement on your dps. This fact is what is currently missing from the theorycrafting - because they do it standing still at a dummy.
3. MM is clearly the way to go until we get Cobra shot at 81 (or was it 85?). These are the 2 builds I'm currently messing around with:
[URL="http://www.wowhead.com/talent#cMZfMGMGoMuroc:zsVVR0M0z"]Max Careful Aim, without Silencing Shot[/URL]; and
[URL="http://www.wowhead.com/talent#cMZfMuRGoMuroc:zsVVR0M0z"]1 in Careful Aim, with Silencing Shot[/URL]
I'm using these for testing because silencing shot (or the lack of it) doesn't change my dps output and quite obviously, 30% crit should!
However, overall, I love the change to focus and new pet buff system and I think it will ultimately make the class much more useful and fun to play. I also think that Blizz have done quite a good job with the CLASS REDEFINING changes so far. Lets give them chance to tweak it. Also, I'm going to give the theory crafters (and spreadsheet designers more improtantly) so more time. Patience my friends!
EDIT: Forgot to add glyphs - fixed!