Why is Blitzcrank the most rewarding support...
And everyone else just sucks. You land a Blitz hook, you're going to get kills. Or at the very least burn a flash. And if you miss all you have to do is run away. LOL.
Take another support, like Bard, for instance. Even if you land your ult, you're not doing any damage. Half the time you end up saving someone you were trying to kill. Or someone like Soraka. Sure she can heal forever, but she's killing herself while she does it. And anyone with half a brain can dodge her skillshots. There is not a single support in this game who is more rewarding than Blitz. Just admit it. We need to either nerf him or bring other supports up to his level. He continues to be a highly contested pick at all levels of play and for good reason. It's time for other supports to join the spotlight. It's time for change.
Ok, I admit that Janna and Soraka are still pretty good. But everyone else is just meh compared to Blitz. When other supports land their skillshots, zero fuks are given by anyone. Blitz lands one skillshot, and it's gg.
has some of the greatest "f*k you, assassin" moments next to Janna. Her kit is decent for making picks, and her poke range is far if you manage your EQ combo and mana appropriately.
good map awareness means your top laner can be saved from that gank, you know. Building 
can really boost your teammates' damage in a fight, like other multi-heal/shield champions (Karma and Sona being the main ones that come to mind).
is the opposite of Blitzcrank, and equally rewarding.
it's obvious what they do
He's like Blitzcrank, except he's actually good at peeling. And surviving. And teamfighting. He's basically better at almost everything Blitz does, if you ask me.
is is often picked, the other is an LCS staple for a reason
I'm still binded from that one game in season four. Also, dat magic shield is severely underestimated.
Often called a better Sona, one does have to admit she packs a decent package of cc (dat ult tho), heals and poke. ANd her passive+ult makes for a great engage.