George is widely regarded as a better overall player than Kyrie. So I don't think he needs to outplay George. I'd be happy if Kyrie just played like the best version of himself, particularly on defense. Maybe he's injured or something, but he just isn't giving playoff caliber effort on defense. I feel like Kyrie hasn't even tried on defense for long stretches of this series. And when he isn't trying, the Cavs are already playing on the backfoot on every defensive possession. We know he's capable of playing solid defense because there have been moments in this very series where he has tried and it has actually yielded positive results. But those moments have been too fleeting amidst long streches of apathy on defense.
I'm not remotely worried about his offense though. He's arguably the most talented scorer in the league and he will figure it out.