Yeah, I don't know, I don't find it particularly romantic to have a relationship where one person has to do the entire work of fixing the other before he can be of any use to her. A partner is supposed to be a source of support, reinforcement, and safety, not a demanding and strenuous project to further drain one's emotional resources who provides nothing and costs much.
That's, of course if Bats were even interested in change, or DC could permit it (as you say, he sells as he is, and a radical personality change would be rejected even if it weren't at the behest of a woman).
Bronze Age Bruce was a more reasonable match, though, so there's always that goofy-ass story where Babs and Diana fight for his love to distract Copperhead. ^_^