I don’t know. I guess anything really. This is the point where I usually just start using it. If I find myself using it a lot (which I know I will with this one) then I’ll usually discover new features that I want it to have as I’m using it. Once I have everything down to the point where I don’t feel like it’s missing anything, I’ll package it up and release it.
Plugins tend to stay in this proof of concept mode for a long time for me until I’m sure there’s nothing else it needs.