I'm a tad bit confused why Nasus is still buffed

Why would you even buff Nasus in the first place. Hes not fun, or interesting, or really anything. He's just a mess of a champ. Literally you could remove Nasus and nobody would care. Also, his early game isn't as weak as everyone thinks it is. Unless your playing a champ that can totally harass him without any punishment, like Darius, he kind of just sits there. Taking it all. The poke, the all-ins. There's so many things that just makes him perfectly safe during the early game. Like his slow, or the fact that if he needs to, he can last hit from range, and he can take biscuit delivery and corrupting pot, and that paired with his lifesteal just makes uninteractive and unkillable. The fact that he can just avoid punishment like that is pretty stupid I think. Honestly I think the problem with his champ is not that his late is to strong, because it really isn't. There's so much kiting, everyone is so tanky, etc. I think the problem is that his early game isn't weak enough. Also i think sheen on Nasus is pretty dumb, because it just makes the fact that hes not supposed to do dmg in the early due to the fact that he is a scaling champ irrelevant. It boosts his q dmg by a pretty large margin, and makes it to were hes not weak early at all. Hes just not as strong as he is in the late. Also i think wither is pretty uninteractive and unfun. I don't understand why withers CD starts after it is cast, not at the end of the wither duration, meaning effectively, wither is on a way shorter CD that what is reasonable. Also i think his ultimate is way to good in the early game. Hes supposed to be a late game carry, so why is his ulti so strong in the early. I kind of get the extra health and extra armor and magic resist, so he can survive in the early and be stronger in the late. The problem comes when you add all the stuff that Nasus has at that point with it, like sheen and all the armor hes already stacked, and the lowering of his q CD. So here are my suggestions:

1. Nerf his early game by doing something like lowering his healing, or something of the sort
2. Nerf his ulti. Maybe make the q CDR be something that comes at the second level of his ulti, kind of like how Noxian Guillotine "unlocks" at level sixteen
3. make it to were his wither cd starts after the duration, that way it has an actual CD