From reading the PDF, I think Nimble is really not a simulationist game. The armor rules are an example of where they work as a game, but may not match up with your ideas about how armor "should" work. I think that is a factor really to take into consideration about playing it.
I like what I've read, and I'm all about the gamist train, but for me the question is about if there's enough character growth and customization. I'm coming from my group with PF2 and that is a game about choices and character builds. I'm going to run it as a test session and we'll see.
For what it's worth: this is a beautiful looking game that has excellent graphic design. It also appears to be completely workable in play, but we will have to see how that works out.
I know I can run 5E adventures, but does anyone have a suggestion for adventures actually written for Nimble? Might be nice.