Let me put this simple. The ability is not OP, it is its sinergy with other call-ins. End of debate. As for people wanting it to be nerfed. I proposed at least 3 variants to revamp it into a less "exploitable" ability. If none of them suits you, then give your own solutions.
Otherwise Nerf all the game so it dies by once and for all. (Thats what #Alliescrybabies want it seems)
How would you, playing allies, counter the enemy flare? What unit/strategy/ability would you use to counter it?
Generally, everything has a counter of some sort. This ability lacks that. Hence the issue.