This has always been. I raided shit loads Pre TBC. And you could always use the Evade trick at the raptor. But what was the point? It was easily offtanked. And if you did so it evaded, it reseted aggro, and when it went lose after a while, it started one shot healers or others.
The Onyxia bug, happens ocassionally, when you stop your DPS at a certain point. She will then wander around, run into the egg cave, and just sit there. Take damage.
This ain't exploits, more like bugs. And it's not becaue Blizzard focus on new content. Even if they add Northrend, they won't make the Blackwing Lair, or Ahn'Qiraj bosses soloable, or normal elite mobs.
Sigh, at these posts.
I like your contribution, but no rep on this one. Was not enough to satisfy me, unfortunately, when you descibe the "bugs" as they are something Blizzard did to focus on something new, it's always been there.
*Sorry*