Alright, so for a Rom Hack, I'm wondering if I can disable weapon growth throughout the whole game, so that the only way weapon ranks are gained is via promotion, just like in FE4. Would there be a way to do that?
It would be a simple matter of setting all WEXP values on all weapons to 0. It might be a bit tedious to do in Nightmare, but it's a snap of a finger if you're using CSVs. Regardless, it's not difficult.
Oh, I assumed setting them to zero would give a default growth instead of disabling it. I should've tested it when I had the time to. I apologize for wasting your time in answering your question.