I don't think I've ever seen a movie he was in where I enjoyed his acting, and this one didn't make me change my opinion. I just find him underwhelming and not entertaining to watch. There are far better leaving men who could have been chosen.
Bridges & Boxleitner were excellent in the original, pioneering a new type of cinematography. Hedlund & Bridges (again) did a fine job in the sequel. Bridges was there once more for a bit of flavour in this one, but I don't think Leto is good enough to carry a film.
I loved the original Tron as a youngster, and the sequel a decade ago was ok. I'll admit there were good special effects in this one, but that's expected now. The soundtrack was good too, though I thing the Daft Punk score from Legacy is the best of the 3 films. I think it's time for Tron to be put to rest 🙏