Haha, well, there would be lots of death and strategic losses. Actually, I can't see Hakuoki effectively becoming a SRPG because you'd have to lose 2/3 of the battles in the last few chapters of the game.
Still, if they found a way it might be interesting. Actually, the very premise would be neat. Usually SRPGs are about outwitting your foes through tactics, but Hakuoki is all about lost causes, no matter how skilled you are.