I'm thinking about this because of the Isle of Quel'Danas dailies, specifically the quest Crush the Dawnblade. For some reason whenever I do this quest I run into Dawnblade Summoners who are evading. This puzzles me because I can't understand why a ranged mob is evading: it doesn't have to path to anything to hit it, just get into range. Is there some way a hunter or some other ranged class can shoot them but stay out of their range?
All I know is, they stay evading for what seems to be forever. There always seems to be one or two hanging out around the Bloodcrystal, impervious to attack, and another couple scattered around the island. Once I found one evade bugging merrily out by the coast, surrounded by imps. I suppose this could just be how they relax.
This may have just made me more sensitive to evades in general, since I seem to have had a week full of them: evades in TK, evades in ZA (the multiple lynx packs evaded twice, that was fun) and a fantastic evade on a Gruul's pug where Kiggler just couldn't or wouldn't hit the moonkin. The lynx packs evading doesn't even make sense, as the mage was right there spamming AoE and they should have had no difficulty pathing to him. Heck, nobody else seemed to have trouble heading over to hit him in the head, what was the problem for the cats, distracted by a momentary gigantic ball of yarn?
Have you noticed any further evade oddities lately? Mobs that seem to get stuck a lot, or particular instances that seem prone to the issue?