I have respect for your opinion, but you seem to dismiss that McGregor actually learns. That's quite a crucial aspect in MMA. He'll make the adjustment, he'll get his cardio right up. The second Diaz fight that when he doesn't think he can walk through walls, he notches up, he has something to prove to himself.
That "Good knock. I want a rematch" tweet from McGregor actually shows where his head's at. That wasn't days or weeks after, that was in hours and that, Shev, is self belief restored.
I don't know where Nurmagomedov goes from here, if I'm honest as he's showed his hand and there isn't 'more to come' as you might expect, but just the same kind of grind.
The third round showed me that if McGregor can sprawl through the chains, he would dishearten Nurmagomedov enough to keep this on the feet, like Iaquinta showed the world.
I think McGregor's chance has just improved massively.
I will say, though, in the future a fighter can't have two years off and walk into a title fight. I don't care how good you were, there should always be a 'tune up' fight from 14 months out, at least.