This commentary treats all the eye pokes as intentional, which I don't like. When it comes to eye pokes, the UFC doesn't have a cheating problem; they have a glove problem. People have broken down the prevalence of eye pokes in UFC gloves vs other leagues (particularly the old PRIDE gloves), and the PRIDE gloves dramatically reduced them. All you have to do is look at the resting hands in either glove to understand why,

Now, imagine seeing this problem with an obvious solution, and the UFC still doesn't fix it...because that's where I'm at. The UFC unveiled their new gloves and the first fighters to try 'em on were like, "I don't think this solves eye pokes." What a joke?
I also want to differentiate Jones/Stipe/Cormier "cheating" from Leon Edwards (and Islam Makhachev). Jones, Stipe, and Cormier weren't intentionally eye-poking; they were fighting for lead-hand dominance. By trying to intercept opponents with their lead hand, they are continually at risk of an eye poke. The intention is defense, and the eye poke is an accident after.
Leon's groin kicks were similar. His intention was to hit Usman low enough that it deterred the takedown attempt.
But Leon did something along the fence that's just plain dirty. He put his fingers into the wrist opening on Usman's glove to establish wrist-control. That's just plain cheating, and he did it repeatedly.
Islam has turned the same tactic along the fence into a strategy. I've seen him land multiple judo throws, and he set up off the same "fingers in the glove" cheat move (he did it to Oliveira and then to Poirier). Ironically, Conor did the same thing to Khabib to prevent a guard pass. Either way, THAT's a form of blatant cheating. Refs don't catch it, and it should be an automatic point deduction because wrist control is way too important.