One issue with supports, kit overlap

One thing I've noticed among a lot of the supports which may be a reason why it's such an unpopular role is that a lot of the champions have extremely similar abilities. Sona: Damage spell, Heal & Shield, Speed up and move speed slow (Auto E), Stun Nami: Stun, Heal, Speed up, Slow Karma: Damage spell, Shield, Root, Slow Lulu: Damage spell, Shield, Speed boost, Slow, Knockup, Polymorph Janna: Slow, Shield, Knockup, Heal

That's just the enchanter supports. Most tank supports are just as similar with a bunch of different ways to throw their bodies to stun and block the enemy.

I think a big problem that Riot has been trying to make supports more interesting by giving them the most active items, but that only further homogenizes the role further. The issue with the support role is that there's only so many ways to protect or engage for your team. I think they need to make each support have more specialized jobs so it doesn't just come down to "Which support is the strongest right now?" Would be kind of interesting to see them do a full Support update in line with the other class updates, but that would beg the question of who would need to be changed the most while being able to keep each of them different enough?