Never saw this amount of bugs and other such problems in previous expansions, it's getting almost as bad as early vanilla.
Something changed in the Blizzard dev team that caused this? I'm just getting the impression things are being rushed and/or dealt with by inexperienced people and causing all these glitches. So many achievements and quests bugged in MoP that still haven't been fixed numerous hotfixes and a content patch later, the bugs are even spreading to the armory, there's an extra Garalon in the HoF listing that still hasn't been removed, and just now today it's deleted all my normal/heroic t14 kills.
Not sure about anyone else, but I'm getting this feeling that they are sacrificing quality for quantity when it comes to WoW? I mean, I love the content and the speed of it, but I'd happily wait a month longer between patches if it means polishing it to their previous standard.