Tito said he won't make a decision in-season. Paraphrasing because I only saw the video of this, but he also something along the lines of "It takes a lot of effort to do everything the right way, and it bothers me that I don't think I can do that anymore." It sounded to me like the decision is already made.
Oddly, I think he's actually missed less time this season than in any of the past 5-6 years. I only recall him missing 2-3 games and that was more of a precaution and to run some tests. He's also said that he eventually needs a couple of more surgeries though. Before this week, I would have guessed he'd give it one more year to see what this team can do with better health and another year of experience. However, it's also been 3 years now since Sandy Alomar managed the team for 50+ games and then stepped back into his 1st base coaching duties. He's turned down better jobs to stay in Cleveland, appearing to be the heir apparent all along, so I'll be surprised if there are any other serious candidates. It was really this past year that I was surprised Tito stayed on.