Nasus seems kinda OP.
I played Nasus for the first time yesterday after seeing games with him 1v2 enemies easy I decided to try him out, and out of all the champs I have played, I never played one as powerful as him.
What stood out most was his Q being able to melt towers/inhibitors. And because of how powerful he is the enemy team usually has to send at least 2 people to stop me from pushing lane, as not much can solo a tanky champ that has really good DPS.
Point being I really do not think a champ should be able to melt towers that quick.