The Gygaxian vs Arnesonian play space framing is great! It highlights why I was always frustrated with a number of PHB2014 feats that said you could do things (like actor letting you mimic voices) when these felt like things that should have been things anyone should be able to try to do. With slight reframing, actor could let you mimic voices WITHOUT a skill check needed, while others would call under the standard resolution system.
I cut my teeth on 3E and actually like having guidelines for simulationist things, but 5E's resolution system makes it so all you really need is an example DC table. "I do X" "Okay, give me a Y check." "Can I use Z?" "It's not applicable, just raw Y." "Darn rolls." Simple.