Yeah. Surely it would work much better the other way around. Romantically loving your brother leads nowhere.

Asuna might not want to play anymore after this, after all that happened, but Kirito actually has looked pretty happy a few times during Alfheim, so there's no reason he wouldn't visit virtual worlds also in the future. Since it's all virtual and they are basically different people inside the game, Sugu could go all brocon in the game no problem. Not that it would help her found a wholesome life in any way.