I don't really see the problem. People go in and die all the time to the new abilities a boss has, and that's how they learn. What a battle rez does is let that player get back up and the fight keep going long, potentially letting you see that 2nd new ability on the first pull instead of hitting it and wiping on your second pull.
"This isn’t vanilla WoW anymore. We don’t need 40 people to run raids."
No, and we don't reach bosses with the attitude that if we decurse we get free loot. We don't expect to down each boss, if not on the first attempt, then after only a couple of wipes. Multiple wipes are now acceptable and necessary in the new landscape of raiding.
I really wish I'd read this before I made my own post on the subject. This is a really great way to look at it! I totally agree that you can't just communicate that "killer instinct" but I do think that it's a pretty natural development for anyone who first gains the knowledge and then puts the time into utilising it - time which is a relatively small cost overall. The time it takes might vary from person to person, but essentially everyone is capable of developing it.
I think a big part of this is guild culture, though. I've been in guilds where there's been a very tightknit core of 10 raiders and any one of them would have taken the "raid lead" role, which was basically to call things out on vent (everyone was pretty responsible). I've been in 25-man guilds where the officer core has been really prominent (or lack of beter word) and it wouldn't matter if one or two of four were away - everyone already viewed the others as leaders.
Of course, I've seen the opposite happen, where raids have basically not been able to function if a single raid leader were away, which is just awful for everyone - the fill-in raid leader can get frustrated, everyone feels sorry for him while at the same time wishing that the raid would just hurry up and end.
Also, I consider staying up late and watching GSL while drinking a valid reason to miss raids.
I think there's been a lot of over-reaction to this really. For non-druids I don't think it's going to cause much of a balance issue. Maybe a couple of spells need to be tweaked for PvP (casters with heals). There aren't any flat DPS increases which I think makes it work so well. You could argue that the DK one leads to a slight DPS increase, but my first reaction is that it won't be all that much, and you'll need to be a pretty good DK to take advantage of it. Otherwise, I reserve judgement on PvE until I see raid encounters. Maybe there'll be periods of intense AoE healing where not much DPS happens, and you will actually want your shadow priest busting a tranq to help out the healers. Sure, there's a lot to think about now, but I totally enjoy spending the time between raids trying to decide how to optimise my contribution. As for what druids are getting, I see a lot of cool utility. No more will I have to ask the priest to use Leap of Faith, by then it being too late. My only real concern is what Guardian spec will get, since there's so much mitigation and self healing - are they going to be inferior without symbiosis?
I definily like the Day[9]-esque approch Poygasms takes. Losses/mistakes are AWESOME. Be HAPPY when you make them. Now you know exactly what you need to work on!