With all these neat new changes, this is looking to become an awesome game indeed.
I like that you have it set so such things as flying will exert a pony. Would be a bit more cool if as one levels up, one can make doing such tasks a bit easier. One could build up some fast flying speed, or some long time flight, or create a balanced flyer, as one levels up. This I think could also be added to such things as running, and spell casting.
Well, what you have looks great so far. Can't wait to try it.