So uuuuh you buffed Nasus, which is fine

Can we do something about his relatively huge power he has when playing from behind?

What I mean is, no matter how much ahead you get on Nasus, if anyone else in enemy team gets ahead, it is Nasus who comes on top. His kit forces you to stay top, most of the time not being able even to realistically use your TP to help your teammates. He is at the same time great at taking down turrets, and defending them, and he quickly becomes safe from any reasonable 1v1 aggression. If your jungler needs to attend elsewhere, all the advantage you get is meaningless.

Now, I don't mind Nasus being viable and strong, but toplaners have huge problems staying relevant and leveraging whatever advantage they have anyway, and his playstyle is an epitome of toplane island. I'm fine with him being strong - if he works on that, not because someone else on his team does with 0 direct interaction with him.

I do understand that he needed buffs, especially in ranged toplaner meta, but I also do find his kit just as problematic. I'd much rather play vs Quinn, and at least get rewarded if I hold my ground, than be forced to pray that my team doesn't fall behind.

Or maybe I'm just missing something? How do you play vs Nasus if somebody on enemy team gets ahead and team could use your help?