We need more Ad supports/Supports in general
I know, sounds like a bad idea, but maybe having a Gangplank or Poppy support can be cool sometimes, if they don't feed of course. We need more high risk, high reward supports and adding an Ad support, or giving an ad champ the ability to be a viable support is good place to start. The support champion pool is quite small.
Only 10 champs have Support as a primary role Then 13 champs have Support as a secondary role Finally, there are things like Annie, Blitzcrank, and hyper situational ones like Malphite (Wombo combo dream, Miss Fortune, Orianna,Yasuo, Lulu) Poppy (wow ADC bad idea focusing the support), Veigar (I like stuns), Leblanc (Two-chains support b****), Teemo (I like grass), Brand (Fire dance around Teemo) etc.
The lcs supports consist of Janna, Annie, Thresh, Morgana,and Leona, with a little Braum, Blitzcrank, and Lulu.
The day when Poppy was played in the LC$ I was like OMG. When Poppy gets chosen for support in the LC$ I will crap my pants.
support is pretty underrated imo. Has solid harass in lane, a heal / cleanse to sustain himself, and a speed boost for jungler ganks and your lane partner. Build him like a bruiser and he works out great.

).
and possibly
, and AD is one of the most expensive stats out there). In the absolute worst case, your AD support might just end up being a marksman or a melee carry with massive amounts of utility, and stop being a support altogether.
, who has even better CC and utility than a lot of mages and supports, is a marksman, because it's just better for her to farm and get as much gold as she can for herself.