I don't think rolling for stats works so well in a computer game.
I don't think it's conceptually a good system, either.
Too bad this large demand for "rolling for stats" is a problem that WOTC created for itself in the moment they made the point buy system inherently gimped in comparison.
Why it is that by rolling dices I'm allowed to start directly with a 20 on my main stat (18 and a +2 bonus on top) while the point buy caps at 15 with the best-case possiibility to boost at 17 with a +2 on top?
It's an incredibly stupid disparity between the two systems.
And OF COURSE no one who's asking for this system in a computer game is willing to settle for "taking whatever they get at the first roll". The goal is obviously to keep rerolling until an ideal lineup of results comes out of it.
