Soraka nerfs were pretty brutal.
People might not think much of the range nerf on her Q, but that range nerf was pretty big. I find that whenever I get the chance to play her, I tend to take more damage trying to land a Q than I heal from the Q itself.
I hate it when people say that their favourite champion is 'gutted' following a couple nerfs, but I do think this Q range nerf hit pretty hard.