Adding passives/slight changes to abilities on left out champs

Title. Not every champ needs to be super complicated or challenging, but playing these champs feels like i have less to do then everyone else. Just like adding stacking MR to Dr.Mundo's E ability or changing Cho'gath's spikes to an active, i think some older characters like or are a good example of characters who could receive a small buff like that. What do you guys think should be done about the less played/popular champs?

are random examples i don't see often