What if...
...instead of forcing people to play support you come up with other 2 new shining roles you can play in the botlane (so in botlane you would have ADC, Support, ROLE X, ROLE Y to choose from), so adc would definetly fall off with this assassin's rework and maybe one forced to be a support now will fit into a new interesting role? That would add something interesting in matters of strategies and finally will change and mess things up with these Caitlyn, Vayne and Jhin players.