BEZ - It's true that he threw low kicks, but landing kick itself is only semi-significant.
1st - he was landing the kick with his instep and not his shin. This causes far less damage and hurts your foot when you hit something hard (as Tito did when he hit Chuck's knee)
2nd - After landing the low kick, he could have used the opportunity that he just created to chain combinations.
3rd - After landing the low kick and developing sensitivity to it (Meaning Chuck will be looking for it) the Low Kick becomes a great fient/fake.
To be clear - I don't see not doing these things as Tito's failure during the fight, I see them as his coaches under emphasized in camp.