Riot Data Engineers: More Support Stats
I think (along with any other potential support changes) having more support-focused stats could help with making support a more desirable position. As a support, having other stats (besides just the basic of healing) would be nice. An easy(easier?) one would be Damage Shielded. This would allow the supports to see how much they contributed in terms of shielding enemy damage. Additional stats could be # of CCs landed (hard & soft), but that may be a bit too ambitious at the moment.
Though there are likely many reasons that people do not want to play support, stat visibility would help so people can see how much they contributed to the incoming damage reduction for their team mates.