Support role has A TON of impact
I've been and Adc, Top and Mid main over the past seasons, during this preseason I'm training to be autofilled and not suck at it by learning the basics of the majority of supports.
In the next season a lot of players will be autofilled Support, and when you get autofilled and are actually good at it, it makes a really big difference. As if you opponent would be playing in an off-role and you in a comfort role every game, isn't that insane?
I believe One-Tricking support champions isn't optimal, different team comps need different kinds of Utility, Engage, Disengage, Wombo Synergy. That's why I'm trying to develop a large champion pool.
As a Support, you have the Power to say "F* you" to that 
into your
by picking 
or something that can follow up on their engage and turn it around.
You have the power to balance out your team, you may need a Tank, a Healer, Engage, Peel, something that fucks up enemy combos or something that makes your Adc, Mid, Top or Jungle very strong with some specific buffs.
into
is really painful I assure you.
As a support you decide the pace of the lane, and the way your team will play teamfights. You can screw up the enemy Jungler when you see him toplane by roaming and placing some deep wards in his jungle.
When I get into champion select I copy-paste this into the Search bar so that I have a vision of all the supports I can play and I try to pick the best one fitting the team and the most annoying for the enemy team:
Copy-Paste: poppy|leona|nami|thresh|zilean|janna|bard|braum|soraka|karma|vel'|taric|tahm|alistar|lux|naut|lulu|annie|sion|shen
