Using a d12 as a d10 with extra bits is absolutely genius for me. I’m working on a dice-pool based TTRPG system that is based on d10, but I may incorporate this fun tidbit to get some extra juice out of dice rolls.

Yes, but if you don’t offer the same accommodations for the person who goes into excruciating detail about how they lift up an iron grate, there’s a bit of an unfair imbalance there. Same goes for someone who can’t necessarily verbalize an entire conversation on the subject, but can say, “I’d like to try and persuade the Governor that we’re perfectly capable individuals, and specifically bring up how we took care of the rats in the tavern cellar, as well as how we turned away the bandits attempting to burgle Mrs. Henderson’s store.”

If you don’t allow for either of those types of situations, you’re just promoting people who have a real-life charisma over those that don’t.