Skills and Super Ability of the Orcs.

It all depends on the individual player and the map! If a player likes a particular superpower, they will choose it; if they think it's pointless to collect a superpower, they naturally won't. Personally, I use them depending on my mood or often experiment (changing different abilities). But if you're playing on a small map, would you develop a superpower? Of course not! (because you simply won't have time, and you won't have enough experience to develop it).
But if you're playing on a large map where there's plenty of experience, why not develop it?