Get rid of support role
Seriously, just get rid of it. Not enough people want to play it. But more than that....
Too many times games are lost because the support and adc just don't mesh well together. You can almost predict the outcome of a game based on the first 5 minutes of what bot lane does.
Just introduce a support jungle role. I dunno, make travel buffs and things that enable support junglers to get to lane to lane relatively fast, and allow turrets to work as a conduit for certain abilities so that they can sometimes effect a lane they are not in, but an ally champion is nearby.
Support sucks. Get rid of it, 3 solo lanes, 2 junglers--one a hunter and one a support roamer. Everyones happy.