Yaarel
🇮🇱 🇺🇦 He-Mage
5e gives the DM almost total discretion over how to use the skill system. So DM style is everything for the skill system.5E doesn't eliminate player skill gaming. It gives the GM the tools to decide. That's literally the definition of "rulings over rules."
But would you say "ruling over rules" apply to combat rules?
(I see heavy use of skills during combat, such as for stunts of various kinds. So these get adjudication. But the combat rules of AC, hp, attack rolls, etcetera, tend to automate.)