Path of Exile has a similar system, and it's probably the weakest and most annoying part of the game. Being forced to only use one or two skills - with no recourse - because the RNG hasn't dropped one you actually want is really annoying.
That's been my experience as well in D:OS, except that it's WORSE here, because combat is difficult, and you need to make use of your available skills to manage it. Not being able to get some that you can afford, and that you can use perfectly well - because the RNG doesn't like you is exasperating.
I agree with this. I'm okay with randomly generated treasures and even some shop stock to an extent, but I want to reliably be able to get my hands on the skills I want. A large part of the enjoyment I get out of games like D:OS is being able to call upon a large variety of skill combinations, and the tedium sets in rapidly when I'm forced to rely on one or two skills for an extended period.
Controversial as it is to say, this is why I actually enjoyed Diablo 3 quite a bit. Nearly every level rewards the player with a new skill or variation of an older skill to play with. D:OS doesn't need to go nearly that far to please me, but I do want a consistent and reliable increase to my skill repertoire without relying too much (or frankly, at all) on the RNG.
