Heimerdinger Tweak

I know that Riot is looking into updating my and in case they're not sure exactly what direction to go in, here's my 2 . Heimerdinger is a support, whether he's played that way or not. Most builds include which leads to minutes of CC right there. He's all about setting up a team fight arena for his allies to fight in, zoning off the enemy, and getting that sweet poke damage. But even though he is a support, his kit lacks any way to fully play him that way. I think just a small tweak that would greatly impact his playstyle would be to alter his passive so it works as a heal. So here's my proposed new passive:

"Every 3 seconds, allies within range of Heimerdinger's turrets heal for 3% of their max health"

With that small change, the entire meta around the donger shifts. Now he can build like a with AOE healing and the enemy team has a way to counterplay. What are your thoughts?