I don't see how choosing to use minor skills to leverage attributes requires more use of your brain than choosing perks would. Maybe the first time you played an Elder Scrolls game it took some figuring out, but it's really not a complex concept. And grind is not good. I'd much rather spend my time in-game adventuring than performing repetitive chores. I finally quit WoW after I realized that washing my kitchen floor was both more fun and more rewarding than doing dailies. Perks sound like we may be making tough choices between alternative advantages. That would seem to me much more mentally engaging than deciding whether or not to practice a minor skill in order to maximize your attribute gain on level up.