Adding strong healing mechanics to a champions makes healing supports feel less impactfull.
Fiora, Ryze, Darius, GP , Garen can heal (or regen) themselves for some serious amounts of HP. How I should feel good about healing garen for 200 hp when he regen twice as much every 2-3 secs. Ryze can heal himself from 100hp up to full in one ultimate on 2waves of minions while having complete reset on R. Fiora on her ult can probably heal up over 1khp on top of her lifesteal and regen from passive (~150+hp every weak point).
IF this trend will be continued I doubt there will be any fun with healing anybody in this game. Like helping to gush out fire with bucket while Firefighters are hosing all house up.