I do not have a problem with mechanics in fights. It was extremely rewarding the first time I cleared T7 after several nights worth of frustration. It's still sort of weird 1-shotting T6 now after having so much trouble the first few weeks. That being said, I do feel that the mechanics are a bit too unforgiving now. Between lag issues, and just "highway hypnosis" levels of repetition it's easy to mess up once or twice in a 11 minute fight. Messing up once shouldn't immediate make 7 other players annoyed at you.
Honestly the thing that is starting to bother me more, is that everything is immune to nearly all status ailments now. Can't stun, blind, silence, or skill lock bosses at all. Immediate 100% immunity is lame. Especially when a boss uses a skill with a name like voice or shriek.
It's just going to get worse. Just a few days ago I watched a raids preview for Wildstar, and thought to myself "That does not look like fun. It looks like hours upon hours of wipes."