Nothing against her, she’s fun to play and also against her.
But since she’s out, you don’t see any zenyattas anymore because her ult heals just as much as his (+dmg boost) and has Lucio’s speed and good mobility that also puts him in the shade.
Can’t we give our frog and monk more love? 
You didn’t really see Zen much anymore before Juno’s release either. He kinda fell behind with dive being so strong and Discord being weaker these days
RIP to my Lucio, it’s Brig season
I suspect they’re going to leave Juno on the stronger side at least through season end. Next season will probably see some nerfs to Juno or a few buffs to Lucio to differentiate them a bit. They are occupying a lot of the same territory right now.
As for Zenyatta, as long as they keep dive ultra strong, he’s going to struggle. Hopefully they’ll figure out something for our favorite monk to add viability during dive without breaking him.
Zen was outshined by Illari pretty much though imo.
She deals good dmg and is far less glass cannon like zen.
But Zen’s been relatively rough most of ow2 time regardless.
Lucio has always been one of the best supports in the game because of speed boost, and other things. He is also one of the highest skill floor/ ceilings in the game.
Juno is just an easier to play Lucio. Her Skill ceiling is not that high, nor is the floor that low, but she is significantly easier to get value from.
Kind of sad, considering speed boost is a rare ability in the game, for Lucio to get power crept that way.
As a Lucio player, I dont ever feel inclined to pick Juno however. I just enjoy solo diving too much.