Buff Klepto, But Have It Permanently Reduce Your Damage?

EDIT: I'm tossing this idea out there as a way to curb Klepto's strength on the small subset of outlier champions that got Klepto nerfed in the first place. It's not like the old version was ridiculously strong for MOST champions.

I was thinking how much I miss the old Kleptomancy as a support main and how a handful of (mostly) toplaners destroyed the keystone for everyone else. With Bandit potentially getting removed also it presents the idea of making Klepto a little more niche pick for those of us who really like to be productive by poking into a lane we probably won't be able to kill. That said- why not buff the hell out of it but add a downside?

• Bring back the increased autoattack range on the proc. Perhaps increase it even further for melee only to allow for more champs to viably be able to use it.
• Increase the item drop rate to where it was pre-nerf.
• Buff the gold pouch drop rate significantly.
• Increase the cooldown from 2 to 5 seconds to make it less abusable by champs with many short cooldowns.
• Slap it with a -30% to ALL damage done downside.

This would make it ideal for supports/utility/tank champions who want to accelerate getting items at the cost of damage and the other combat benefits provided by another keystone. Some late game damage champs might(?) be willing to eat the 30% debuff to get items faster (especially into certain matchups), but 30% is a rather large amount to offset.

I just hate to see a small portion of the champ pool ruin a keystone for a potentially much larger portion.