The problem with Tito isn't that he's taken too much damage (although he might of) he's simply not a good fighter at this stage of his career relative to low-mid competition. Tito doesn't have very good striking; his takedown offense is average to below average; his submission defense is fine but since he cannot get a fight to the ground anymore his submission offense is irrelevant; he has an average chin; he has below average endurance - he's simply worn and old - he can't out-athletic the competition anymore like before.
There are no exciting matchups for him, who can you put Tito up against where it would be competitive? Anthony Perosh? Joey Beltran? Kyle Kingsbury? Those are the only people I can see Tito being competitive against and I would still pick against him in every one of those fights.