When is literally anything going to be changed with Janna
This champion is just insanely overpowered with one of the lowest skill floors in the game and should seriously be looked at for changes, i don't really get how she hasn't been touched by Riot even while she maintains a very high winrate despite being team reliant.
One thing is her shield AD, it just doesn't let the enemy win trades in lane and outvalues anything the other support offers.
The only other thing worth changing is her ult, it should have some sort of cast time or charge before she blows people away since right now it just has the power to instantly shoot anyone away who even tries to engage onto you with no counterplay on the receiving end.
That seems to really be her problem is she has so much hidden power that has little to no counterplay

has single target version on 6 second CD(with cdr) that can also be combo into AOE knockup