Honestly, my main issue is the new champ creation - make a champ like Yuumi as support, and that's awesome!! Then you get Pyke, who has an ulti that resets and can also award gold to your team for assisting? Compare that to Darius, who gets a reset on ulti kill, but has to work much harder to achieve the same. Then you have Senna who is supposedly a support, but is played more as ADC, TOP, or even MID. A support that starts with massive range, scales her dmg and range, gets free crit... has a quick escape that can apply to teammates, a root, and a global ult (which helps her get assist gold mainly). I'm sure i'm missing something here. I'm posting this AFTER her patch too. But yeah, just overloaded a bit.
What i'm saying here is that we shouldn't have to watch champions drop in, then have to be continuously nerfed to the ground every other patch. If they make a champ right, they'll still sell the skins. But Riot is losing face, more now than ever I feel. Keep dropping those champs in, like Sett - who can 1v1 Darius at level 1. No melee should win that matchup while getting bleed on them.
What ruins the game is the lack of balance... and recent pathing changes. Not sure when it got so bad, but somewhere in S10 I just started doing circles in creep waves.