How can Riot encourage strong supports?

The title may not make a whole lot of sense, but I'll try to clarify. Recently there has been a lot of focus on the strength of the tank role in the current meta. For the most part I've seen this have a lot to do with the new Cinderhulk enchantment, making tank junglers more viable. I've also heard people complaining about how the new strength of tanks has greatly weakened the strength of the Carry position.

This seems like a difficult balancing act. Make carries do more damage, tanks get weaker. Make tanks stronger, adc/apc gets weaker. ... But what about other positions like the support? What would Riot do to make the support role strong? It seems that the way the previous two roles have been complimented is by adding or adjusting items. I guess Riot could add some new items that grant stronger utility stats, but would that really make the support role more popular like it has for tanks or would it just make people who already play the support role better. I think that it would be difficult to make a support more useful without instead making it seem as if the carry is stronger.

I kinda feel like I didn't really explain my question very well despite feeling like I just reworded my original question several times. If you have an idea what I'm talking about, tell me your thoughts.