Dear gameplay and balance,I have realised my mistakes in regard to sona and zyra
They deal way too much damage and are way too op,but they aren't picked much so you can't nerf them,so I suggest buffing their counters instead,and I'll start with obviously the guy who needs help the most,as unlike sona and zyra he lacks damage(you can easily see that in champion.gg).
So thresh:
Q: the ability is called "death sentence",but targets hit by it only die 99% of the time,so as qol buff to thresh,it now instagibs his target(this is to help thresh as he lacks damage compared to zyra and sona),the kill will be however credited to the closest ally to thresh(if there is one),as he is a support.
W: WTF,this ability deals 0 damage,NOTHING,that makes no sense,I suggest adding a passive to it that would deal 5/7/9/11/13% of the enemy max hp per auto attack,this is again to help thresh compete with zyras and sonas ridiculous damage output.
E: Have you seen the aoe on zyra's and sona's ults? It's massive,yes,thresh has a big aoe on his ult,but that's his ult,to help thresh compete here,e now has a global range.
R: I think is mostly fine as is,but the fact only the first wall deals damage makes no sense,due to that I suggest the damage will double per wall destroyed,this should punish enemies for escaping "the box",and fits him thematically.
Finally,I've realized something was missing about his passive,this isn't an actual change,it was simply missed in the patch notes.
*passive,added tooltip: "Most balanced thing in this game: If any support surpasses thresh,that support must be nerfed within the next two patches"
I think this is the first step at helping under performing supports deal with the bullshit which is sona and zyra,but ofc we need nautilus/annie/morg/janna/etc buffs as well.