More needed than the damn Yak-3. Its almost identicle in preformance to the Yak-9, which I think most don't understand.
It will have the same limitations as far as weapons and ammo, but you'll just trade in a bit of top end speed for a bit of climb rate and maybe a bit tighter turn. Thats it, it won't really offer anything else over the Yak-9, and not much of those two benefits either.