I liked it for the same reason that some people disliked it. It's simple. It's just an identity story that "tried" to add a bit of a spin with the bunny outfit. Some bonus points for having the "I'm free! ... So what now?" thing going on with senpai.
Although I may have liked it more than I should, since I came into this story thinking it was one of those "I picked up a cat and it turned itself into a catgirl" kind of stories... just with rabbits instead of cats. So, getting some actual story was a nice surprise.