Originally Posted by MrYamazuki
It's because blitz himself does quite a bit of damage and isn't typically squishy, and even if he's about to die he does have a little shield that gets even better as his max mana increases. On top of having Utility, some damage and a bit of tanky-ness he has it all on rather low cool downs..
It's not just that, though it's a big part. But the part that makes him broken by design is that he pulls you to HIM. He stays safe. His carry will be in position. You or your solo queue'd partner will likely panic and not be in position, because it's so sudden. At least Leona takes a risk.
But the broken part is that a grab is a very clear signal for any ADC to initiate. It's ALL the communication Blitz needs.
That's ****ing powerful in solo queue.
While, to play against a good Blitz, the support and ADC really need to communicate. On Blitz's position, on warding, about their matchup, about when to actually stay and fight despite getting grabbed, and when to gtfo. Not to mention actually harassing or initiating on Blitz.