I personally find myself (on my priest), clicking some abilities that my fingers can not reach as I try to use W, Q and E to move my character. I have thought about getting an attachment of sorts, possibly the Naga mouse that was released (with 1 - 9 bindings on the side, /drool)
Clicking - To a point, yes... If you are a rogue and your clicking your abilities when you really need to spam 1,1,1,1,1,2,1,1,1,1,1,2. Then yes, I'm going to consider that bad :3
Backpeddling - Instant Fail, enough said... I'd rather get kited by a hunter that knows how to backstrife than get shot down by a hunter that goes, SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
for 2 minutes.