I'm using the GIT-Master so I'm keeping on top of the new features, but will take my time to add these last units so I can release around the same time as GAE 0.4, I might just release a little update when 3.4 comes out if there's anything significant.
As for file size, it'll probably be around the same as last time, maybe a bit more due to the normal and specular maps and also there's an entirely new Hyperion faction pack to download but all factions should have a similar file size, though with png being used more in the second faction, the file size will be reduced a bit more, eventually I'll convert all to png (the Gians and factions after will be pure png).
What makes all the filesize is the g3d format really though, before releasing I'm going to have to butcher some of my animations so both factions can work in the same game again (at the minute if I play a game with Hyperion and Necribus both in it crashes and closes without an error prompt unless I remove enough g3d models to free space, this can be stopped by reducing the size of g3ds by removing a ton of animation frames, at the minute it's ~30 I'm going to halve this and less than 15-20 will ruin most animations, g3d has good interpolation but not enough). This is why I've been going on about the md5 format a lot recently, with this hopefully model overloading wont be as big of a problem as I'm struggling to get 2 of my factions in game, with all 5 there is no chance.