No one except Thresh or Janna is allowed to be viable at support

How does sona make bot lane interesting whatsoever lol

She mashes buttons in any order to give auras

Where is the interesting part of her kit exactly

play vel'koz or brand or leona or blitzcrank or braum or nami or even soraka is still decent. and Sona is fine her main problem is that to be effective she has to play up which puts her in danger of being all-inned or ganked. If sona doesn't die early or doesn't get ganked she will win every singe lane 90% of the time or more.

Leona and Morg are still as strong as those two, and Braum, Blitz, and Annie are still really strong too.

The problem is that tresh brings too much to the table, such as Janna.

Janna and tresh can get your ADC out of trouble and curiosly, both have uncounterable CC. Knock ups. If your adc screws up , as treshuse W, use Q, use E, and even after that they are still engaging, use R and exaust. Oh, you are winning the fight? Bring him back with W, usa E, use Q and use R to screw the other team disengage. Way too much utility in his kit.

With janna the problem is the same. Q for engage/disengage, W for engage disengage, E for engage disengage, and even her R is for engage/disengage (if you position yourself proper). Janna is a worse offender since you can't predict by any means where her Q is going to land.

Leona is especialized in engage, but only has 3 of these tools made for that. Alistar is the same, only Q and E have a utility combat value.

Thats why Janna is getting nerfed