I want Nasus reworked (Not his QWER though)

I want his passive sustain reworked. I could care less that he could build full tank and do more damage then the ADC and be tankier then the tanks on our team. It would be a lot easier to fix if he had any other passive that wasn't healing. Since he is made to farm he can just ignore you completely and farm while outsustaining all of your damage while you waste resources. Literally the only way he can be stopped when he gets 300 stacks is with half of your team going top to 3v1 him because by then he's super tanky and he can sustain through even 2-3 people still.

All of this could not happen if he didn't have that costless, cooldownless sustain passive which stops you from being able to trade with him in laning phase. Even double his damage for all I care I want his passive gone.