Don't give me that shit. An eye poke is nowhere near a dude rushing and ploughing into a defenseless receiver. It's not even on the same planet. It could be football, hockey, rugby, etc. You know when a guy is defenseless. They aren't moving like The Flash, dude. They're in control of their body. Little different from a fight, where your hands are constantly in the face of your opponent, and any defensive reflex could result in an eye poke.
Okay, so lay out what could "potentially" lead to an eye poke in MMA, that doesn't compromise the fight. Gonna get rid of the natural instinct to paw at an opponent to create distance, or naturally extend your hands(and fingers) to defend against a million different offensive moves?
Again, the systems are in place to combat it. It's up to the refs to enforce them. Intentionally poking someone in the eye is already illegal.
Sure, but that again falls at the feet of enforcement of the rules that are already in place. There is a reason why you don't see that enforcement all the time. It's because it's a generally incidental foul, that is damn hard to figure out intent. Same deal with nut shots. Shit happens. The rules don't need to be changed because some fighter some people like got poked.