Very unpopular opinion incoming.
Remove Klepto, it's doing more harm than good IMO. Gangplank, Illaoi, Ezreal and Nasus. These guys can absolutely abuse klepto and more than likely they'll get nerfed because of it. This keystone is so inconsistent with the champions it help that it winds up being actually abused more than it is actually used for helping champs it was made for. It's essentially taking champs with mid-late game power spikes and giving it to them in the early game causing a massive snowball which can potentially become unstoppable.
If certain champions are relying on Klepto to keep pace with other champs I'd say we have a bigger problem to look at.
is the only champion who should realistically be using klepto