I'd love to see rogue (and others?) sneak fixed.
As it stands now, you're in combat, randomly hitting evade, w/e, then the mob dies.
The first time after you press 'sneak' it fails, 100% of the time. IIRC you don't get a success or fail message, it just doesn't work.
So then you have to stand there for 10 seconds while sneak recycles (it pops up, so its not like the client even thinks you're sneaking or something), then press sneak. At max skill I don't think i've ever seen the actual (second) attempt fail.