I'll hold my judgment until I play the new Support champs. My gut feeling, however, is that this will cause True Support champs to simply disappear, because having more damage will ALWAYS trump support.
This is specially true nowadays, when everyone and their dog has a self-buff to rely on.
What would a Soraka do in games, now? Pop one heal, and then they become simply bad mages. Sona at least has the saving grace of having the auras, Soraka's pitiful passive won't cut it, anymore.
Beefy champs and powerful nukers will rule the land.