There needs to be a larger conversation about enchanter supports in the game. Riot wants interactivity, but the players are tired of damage creep and poke lanes.
There are a lot of aspects to that potential conversation, but the bottom line to me is this – there needs to be more skill associated with shields and heals for enchanters to provide satisfying gameplay or counterplay.
Point and clicks with a simple, linear cooldown aren't cutting it. Riot knows this; they are adding a mechanic to the shield cooldown on Janna that rewards more active Janna players. It's a good start. I think Taric is pretty healthy design; Yuumi, remains to be seen.
What I'm sure of is that champions like Lulu, Soraka, Sona, Nami, and pre-9.11 Janna are too simple to ever be very healthy. So I welcome additional complexity in the kits, and I think it should be a starting point, not an end point.