Remathilis
Legend
The fact that the martials don't meet their full potential in attack and damage means they lack the leeway to branch out.
Or in layman's terms, a fighter with 12 STR should have the accuracy and damage of a cleric with 22 STR (Giants gauntlets) because the fighter really knows how to fight.
Kinda how OS fighters could have meh combat scores but still be terrors on the battlefield.
But you recreate the problem of a fighter who can never miss and a cleric that can never hit. A monster who is a challenge to the cleric is a slog to the fighter and the one challenging to the fighter is deadly to the cleric. One of the best parts of 5e has been the fact that the math keeps classes who aren't dedicated warriors competitive but not superior in combat. I don't want to get back to fighters who only miss on a 1, but a rogue rolls a 20 or misses.