billd91
Not your screen monkey (he/him) 🇺🇦🇵🇸🏳️⚧️
I am not sure I get what you mean? Isn't it this way in 3E already? Aside from the Tomes, there is only one type of bonus to enhance each ability score.
There's also a size bonus conferred by a spell like Righteous Might. With the tomes, that's 3 possible bonus types (at least for strength) right there. I'd extend the limitation of bonuses farther, of course, and fix the problem of too many interlocking buffs throughout the game.