I'm having a ton of fun with my new team, (my hunters hit 90, 520ish ilvl) running 4x feral druids, 5x once they catch up with my 90. Lots of fun! Melee is not really difficult per-say, but you do have to pay attention to positioning more (abilities from behind the target) and boss cleaves. Druid is fun since they can stealth, and heal if need be.