Yeah I agree. It comes down to the old WoW talent tree issue.
Basically there's a right way to spec and a wrong way. All it means is if you didn't look it up online you're doing it wrong and if you did you're okay.
I'm plenty fine with the skill gap being in the abilities themselves. Predicting where to aim a Stitches hook, knowing as Illidan when to use Sweeping Strikes offensively or defensively, or just general map strategy.
"Builds" and such are just an illusion of depth.