No one asked for them but i’m going to go ahead and shoot my mouth off anyways.
HP/ATK- They did it fine the way they did it.
Speed- should be 2 pts of speed per tier, IMO.
Armor: are you nuts!? fine, let’s do this…should be restricted to animals that already have armor and should be 1pt per tier, for a max of 10% additional armor. game changing but i don’t think it breaks it.
Crit- Lunacy! fine…each rank gives 0.5% chance to crit, an addition 5% at max rank. once again, game changing but i don’t think it breaks it.