See I don't personally see this solving the problem though. Plus just seems like something people will just abuse just for the sake of getting stuff faster. Plus then what's happens if they do something like this and now Top or Jungle is taking forever to find because everyone wants to play Support?
What they should be doing is seeing why people don't like playing the role and fix it from there. As someone who mains support though I like it currently. It's fun and enjoyable for me to play that role and I feel much more comfortable unlike ADC/Mid/Jungle worrying about kills, CS, etc. I'll ward where it needs to be warded, and help my adc early game.