Are bodily pain and embarrassment really that important? I'm rather fond of romantic troubles, but that seems like the sort of thing that could be negotiated with the superhappies by comparing it to their empathic pain. It also seems like the sort of thing that could just be routed around, by removing our capacity to fall out of love and our preference for monogamy and heterosexuality.
The problem with much of the analysis is that the culture already has mutated enough to allow for forcible rape to become normative.
I'm not sure that the supperhappy changes as to "romantic troubles" are much more change than that.