The problem is that, with gaming, even this is so subjective (relative to more than just my own personal belief) as to be REALLY hard to pin down for a company.
Take expertise. I like the mechanic, find it easy to implement and really like the fact that it gives rogues a leg up in the skills department. And I like the fact that other classes can get it - but a significant enough cost so as to both require thought AND to not impinge on the rogue. So, for me, it is quite good - I use it without modification of any kind.
Yet, there is disagreement - as seen
here. Plenty of people seem to think it's a lousy mechanic that needs to be either thrown out or completely reworked.