Between these two factors, the importance of drafting Raptors has gone way down since:
1. It's easier to win the tempo on turn 3-4 rather even if you don't on turn 2.
2. There's so many 2-drops that if you find yourself short on them, it's not hard to catch up in the last few draft picks. It's of greater relative importance to draft the better high-end cards, since there was only ONE good 5+ drop added (Force Tank).
So draft-wise, it seems you want to bump up all the decent 5+ drops. And play-wise, the game is less likely to be decided by someone failing to draw their 2-drop. With the games going longer, classes with better high-end cards (Druid, Priest) or later-game hero powers (Warlock, Priest, Shaman, Paladin) get bumps relative to the better early-game hero powers (Rogue, Mage). Also, the increase in sticky minions makes buff cards better, and thus the classes with more buffs (Paladin, Shaman, Priest).
I haven't really figured out how all the classes stack up against each other yet, or what the right draft priorities are beyond the very top, but late game seems much more important than before, and Raptor seems much more like a vanilla card than an arena dominator like it was before.
Thoughts?
My thoughts. This is very interesting because I've basically heard the exact opposite from other people. GVG made the game faster, because it didn't add a lot of great higher cost creatures, added many good cheaper creatures and also diluted the card pool away from spells and removal, making it much harder to find them. Because of this, missing a 2-drop is more likely to lose you a game post GVG because it is harder to find spells to catch up and with so many good 3 and 4 drops it is more likely for your opponent to have them and get way ahead of you on turn 3 & 4.
I still think hitting 2-drops is absolutely essential to good Arena performance. I agree that drafting tiers should have shifted post-GVG and your new summary looks good to me. You are absolutely right that the really good 3 and 4 drops are highly coveted. Also, getting good late game cards is a higher priority because of the diluted field. However, I'm not sure I'm willing to say that hitting turn 2 is less important now than it was before. It is now much more likely that your opponent will have a turn 2 minion and a solid turn 3 and 4 minion, while you try to catch up.
I think much of what you said is good advice, but I think that Raptor got worse not because it's terrible and hitting turn 2 is less important. It got worse because there are now more and better 2 drops, so you can more easily pass it up knowing that you will probably get something better later. Curving out with minions is more important now than it was in the past and you do not want to miss turn 2.
I wonder what other people's thoughts are? Is the arena faster now or slower? Do you get snowballed worse when you miss turn 2 now or do you find it easier to come back on turns 3, 4, and 5?