A bunny Megumin would be much easier to carry home when she's knocked out from casting Explosion, a bunny Aqua would probably find a way to be even more annoying than regular Aqua, such as by constantly chewing through Kazuma's belongings, and bunny Darkness… that just feels weird to think about.

I'm uncertain about whether the idea of a non-violent rabbit getting the living hell beat out of it, all while it experiences pleasure from the beating, is uncomfortable or even funnier than normal.