Nasus rework idea

What if nasus's Q stack's made small changes to his abilities, something like Cassiopeia's E or viktors ability's when he buys his augment, for example lets say getting 200 stacks changes nasus's Q to get something like a built in phage, or more more % lifesteal on it.

400 stacks would change his W for something like Damage over time while being slowed, or maybe making it apply Grievous Wounds.

600 stacks could change his E for more movement speed while inside it, or more Magic pen to help his team in team fights.

800 stacks could change his R to give him something like some Tenancy to help deal with kiting, or ulting could give him more armor and MR, also 800 stacks could change his passive too, maybe increased lifesteal?

They could nerf some other things about him to make it balanced, but overall I think this would make Nasus way more interesting of a champion. These are just my idea's, I wanna know what you all think, too OP? other idea's for changes that you think would be better? Or even if you think these changes would be a good idea in the first place. Thanks for reading.