This hack looks great, I really hope it gets finished. There aren't many changes I would make. The only changes I would make have, for the most part, already been suggested, but I think as long as you add a few more pokemon, this game will turn out more nicely. The only pokemon I would probably add in would be some like, the starters in some way shape or form, for them you could be creative in the method. Only other suggestion is easier access to eevee would be nice.
P.S. I haven't started the game yet, but i plan to start tomorrow, if not tonight.