Do the the small races (halflings and gnomes) get "extra" bonuses to offset their inability to use heavy weapons without disadvantage?
Well, there's the fact that they can ride Medium-sized mounts like Donkeys in places where Large mounts don't fit, thereby benefiting from the mount's higher movement and free Dash/Disengage.
Also, Medium-sized mounts are cheaper.
Goblin or halfling sorcerers have the best of both worlds: don't care about heavy weapons, can ride their mounts anywhere.