I didn't jump in on the invasions right off, but I'm glad I finally tried them. They're just great, action packed, tons of people taking down monstrosities left and right. It has the right feel for this sort of public event. Very dynamic, quick and exciting. I'd like to see more of this sort of event in the world. I don't know how they could be woven into the storyline of the world, but they're so well done , more more more, I say.
I've sent a level 100 and a level 94 druid in. The level 100 had an easy time whereas the 94 isn't well geared and you know, dead.
My Frost Mage has some oomf to her for the first time in ages. She can actually fight effectively and contribute. Even with her longtime troubles, she's my second favorite character, though not class.
My poor level 74 Priest. She's always been a Discipline Priest. What an awful time of it she had. I actually switched her to Holy, a spec I've never played, because as a Discipline Priest I didn't feel that she could heal at all. Honestly, her healing skills as Holy (and I used Icy Veins for this character since I had no idea on Holy Talents or rotations) seemed sort of weak too. The environment isn't the best, since targeting a player to find someone who needs heals in the utter chaos is hard. Then you get someone but they run off to the next mob out of range.
My Fury Warrior doesn't seem to have lost many skills, if any. She was easy to play and I got her so close to level 85 and she's off to Pandaria. She had the bad luck in the fight to target a red person who turned out to be a Horde meister. Oops, flagged pvp.
I've lined up my warlock, paladin and rogue in Westfall so I can try them out. It is working out so well to send them to these invasions to try out the new talent choices and rotations. I'm not even so concerned with leveling anyone, I can do that anytime. The environment is perfect for getting a look at how the classes play now. I'm pretty excited to see comes next.