
Originally Posted by
Mormolyce
Sub was never "hard", just more complicated and frustrating at low gear levels (before about FL level gear in Cata, you didn't have enough Haste to maintain recup, rupture and SnD without something falling off). And it still has that shitty positional requirement. Plus it makes you burn Vanish for DPS (that always annoyed me). I haven't played it seriously in MoP though.
Those sims are outdated, or to put it another way, wrong. Sub is behind Assass in the real world. The high variance you see in WoL is because just as you say nobody uses it.
Play it if you like, I don't think it's enormously behind or anything. But it can be a real PITA if the fight mechanics aren't cooperative.