I enjoyed the TRON movies, the first I liked better than the second. The soundtrack by Daft Punk is insanely good as they're one of my favorite artists of all time and really fit the aesthetic / mood of the movies. I wish they made better movies though I agree they could have been much better. I think visual wise they did a great job taking the concept of original TRON and modernizing it, if anything it was fun to see in theaters to eat popcorn and gawk at the world design. I enjoyed the original despite being born in 99 and it being past it's prime because I loved the TRON themed room / items in VMK and it made me wanna watch the movie.
I do believe Disney could make one more TRON movie and have it perform relatively well if they improve the writing / story compared to the first 2 movies but Daft Punk not making the soundtrack would honestly be a gamble to me since they split up. Especially with the TRON coaster coming to WDW I think it could reignite some love for the reboots since it'll be fresh in some people's minds. That said I do not believe Disney would make another as they are focusing on so many more things especially Marvel and Star Wars related for Disney+ as those two are clearly their cash cows and guarantee profits from D+ subscriptions or ticket sales for the big movie releases like Dr. Strange, Spider-Man, Ant-Man, etc.