Soraka needs a nerf, turrets need a buff.
Absolutely awful. I just played a game where the opposing team had 2 tanks with 3k health simply walk through turrets.
It's not fun at all, it's so unbalanced and ridiculous because there is really nothing you can do 3v1, they simply ignore the turret.
Riot should really buff the turrets again, make them something unpleasant instead of a tickle that soraka or another healer can simply heal right through.