Would it? The 222 already comes quite early, what would the 221 add? Either it delays the 222 for some reason, or you can get it before the Leichte, in which case OST has an absurdly early light for...what reason?
The redesign would have:
221 with lower DPS with bonus damage vs sniper high penetrations. Role a counter sniper and soft counter micro lights.
222 higher cost and durability 20cm now a anti light tank gun. Role soft counter to light tanks.
That would help Ostheer counter light vehicles at the cost of delaying their tanks.