There aren't any plans at the moment. We've struggled with this problem before, and wrote something similar with https://github.com/khan/KAS/ but we've never worked at doing something inline. We use MathQuill in a couple places, which does the input decently (writing works, but typing something like x^2_2 gives you x^{2_2} not x^2_2), but the output doesn't look great. It's hard to do what the user wants, have clickable bits, and still have good looking output.