A few things I think would be cool to see next Season

A change to Koggles' passive: At the moment, Koggles current passive is Icathian Surprise. It allows him to run around for a bit after death, before exploding and dealing true damage. Don't get me wrong, it's not a bad passive, but it just doesn't seem to fit with Koggles playstyle. Whether you're playing bot/mid/jg the objective is not to die, reducing the effectiveness of this passive. So, here's a bit of an idea for what it could be changed to:

Insatiable Hunger: Kog'maw constantly hungers for more, with each kill increasing his hunger for more. Killing units/attacking champions grants Kog'maw a stack of Insatiable Hunger. At 10/8/6 stacks, Kog'maw's next attack deals bonus magic damage based on the opponent's missing health, and applies on hit effects a second time.

QOL changes to Karthus, Shyvana, and the like. I would like them to get the Singed treatment, where their AOE abilities apply damage .25/.5 seconds, but deal less damage. For example, instead of dealing 100 damage every second, it would do 25 every quarter second.