The word around the forums is that straight healing is going to be diminished in the near future. One of our fellow summoners requested that Shurelia please comment on how this would affect our beloved Soraka, a champion known for her heavy healing support. Here is her answer that gives us a little insight on the direction Soraka is being shifted to.
"Soraka is pretty straightforward.
The idea was to straight up nerf sustain across the board (this includes non-supports as well).
Soraka's new kit will include a dual-build in which depending on how you build her, her playstyle will change drastically. I posted details about this yesterday somewhere... Search function should find it.
The gist of it is more powerful, non-ap reliant heals on a longer cooldown, making CDR the master stat for full support with soft-tanky auras/actives.
As for Sona... yeah thats gonna suck when I have to try to solve her problems..."
the official forums.