I also like that in this variant, castling works like normal -- that is one of the most unintuitive aspects of Chess960.
Or, more simply, player A is shown N random positions, picks one of them and lets player B pick the color.
The other idea works but is essentially just discarding all of the lopsided starting positions, in which case they might as well not be in the game.
I have never played this variant of chess, but on the surface it seems that having both bishops on the same color would be a sizeable disadvantage.
The other randomized pieces (queens and knights) can get to any square, so having two knights start on dark squares, for instance, doesn't seem to really matter.