Yeah no that would suck. In D&D, martial classes are famously underpowered, and that's with class features. If all you get is proficiency, or, if we're being generous, expertise, you better hope you never see combat.
Calamity can still be enjoyed on lower difficulties, and has even made it so that previously expert mode and revengeance mode (a calamity difficulty) exclusive items can be obtained on classic difficulty.