I, in fact, did not know that was how a Drow's 1e powers were determined. But interesting/"fun fact" tidbit.You that this solution is exactly what gave the Drows such a badass reputation in 1ed and 2ed? We all know how over powered they were. Is that really where we want to go?
I suppose my response to that is, as we should all know by now, "If everyone is special, then no one is special."
That is, if this kind of thing is applied to all species, then who has the leg up/is "op'ed"? (not the same/as much as 1e drow, per se. But the drow 5e traits and innate magic seems reasonably in play)
I would argue, no one.
There's just an across the board raising of the baseline power levels attributed to your species. In a way, in that way, it is a different/new way for "player empowerment/choice points" the game has not, really, ever incorporated as default/core game.