Shame that Spear is being removed
It wasn't bad by design, just executed poorly.
A better way to have designed the item to be less abusive by a handful of champions would be to put it on an active cooldown and cap the number of autos that apply it -- lets say 10 right clicks that lower CCs, and by a lower amount than currently. This would greatly reduce the abuse cases of current because Renekton would only get to plow you twice with empowered Ws and the handful of fighters who still scale off attack speed wouldn't go nuts with it because they're click limited, but itd still be good on them, and the more modern casterlike fighters could get good use out of it too as a brief DPS increase.
Also, IMO it should have less AD and more health. Its already a potent damage up when it's used correctly; I don't think it needs to also give so much AD always too. Fighters should be more speccd into tank stats like they used to be.
Again, Spear isn't inherently bad. Riot just never bothered moving it away from its abuse cases which is the major issue with where it sits right now.