Ok let's see. I like the fact that we can't kill them first attempt anymore, for example figuring out a strategy for Lord Feshlak was fun. On the other hand, I think the dragons might be a little too powerful for our gear level. Having a mob AE ramp for 3.5k, and 4.5k nuke at the same time is very rough. The main thing that inspired this post though was the 4k AE rain from Lord Kreizenn. I just don't see a mob like that being doable, especially when we're forced to have nearly everyone 2-3 box. It's almost impossible for a raid to be able to physically move all their toons to avoid the AE before they are all dead.
So to recap, I think having AE nukes that have a fixed range that you need to find in order to avoid them are good. It adds some tactic into the mix, which is always fun. But on the other hand, some of the mobs seem to be a little overboard. For example, the destroyer is undoable without a 4 cleric CH rot and making it a complete ranged fight. I ran oom by 60% with my cleric trying to keep a group of melee healed.
Thanks for your consideration!