Unfortunately, I'm quite busy with work placement and such taking its toll on my free time, so it's difficult to say. I'll set a goal of finishing, testing and stabilising what I have and releasing an update by the 30th. It's just a lot of things have interdependencies, like the new ents need some tightening up of the ent code, since I'm adding bananas and chocolate the umpteen reactions for banana leaf thread, banana leaf flour, and various kinds of chocolate need sorting, animal ponies need proper sizing, buffalo need nerfing, griffons need adding(thanks Crazy Cow), diamond dogs need fixing(they're ready to go). Stuff piles up and I'm completely disorganised at the best of times.
As for Earth ponies being rare, the random number generator just hates you. Try to curry its favour by burning wooden dice as a sacrifice.