Bill Zebub
“It’s probably Matt Mercer’s fault.”
The parallel being: depending on the situation/equipment/enemy, you need to use a different ability score to make your attack.
Does that simplify the concept and/or make it more flexible? Or is that muddling the premise?
That's basically it.
Sometimes the fighter can't get through the heavy carapace, so he's gotta try to hit the weak spots between the plating.
Sometimes the rogue can't get an opening; he's just gonna have to try punch through the armor.
I mean, the basic idea is similar to what casters do in trying to target weak saves.