I like it. There is some cool stuff in here. Since I doubt the system will be even remotely d20-based, it can't be used directly, but we can certainly borrow concepts.
I disagree with the -2 CON thing. Teddy bears are the stalwart and unflinching guardians of dreams. They can be roleplayed like furry space marines. If we were using d20, I would give them +2 CON, +2 WIS, -2 DEX, -2 INT. No level adjustment.
+2 Con, +2 Wis, +2 Cha, -2 Dex, -2 Int
CR/LA of +1, there's no way this build can walk out the door without at least one. id give it a +1 do to the loss of dex and int, both favored for tiny races and stealth classes.