D&D and Pathfinder are like Baseball and Softball, maybe. But going from D&D to Fate or PbtA is like changing to football or fencing. It’s very different. Trying to get someone who’s playing Baseball to take up soccer is tricky. D&D is baseball. Pathfinder is softball. Easier transition.
Sounds a lot like aspects from Fate.
Fate still has numbers, but you could probably hack them off without too much trouble. I don’t know if “the troll is fantastic brawler and you’re a good swordsman” is especially better, but it’s an option