Just writing this as currently I'm sitting on 543 games of ARURF in this iteration alone and I have some ideas about champions that really feel like if someone else has something OP you lost in champ select:
In terms of champions on the weak side, Yorick, Zilean, Taric, and Zac are the worst champions by a longshot to get in ARURF and have not really garnered any kind of substantial changes to help them.
In terms of overbearing, I think not enough people talk about how Xayah is almost a free win every game. Her W is so overpowered with the double attack speed and %dmg increase, combined with her constant root. Morgana (Specifically her Q duration compared to its CD), Master Yi, Zed, and some other crit champions are also kind of frustrating to play against unless you can lock them down but in all honesty i would rather the statistically weaker champions get big buffs than the overpowered ones get nerfed further. That is in the spirit of ARURF afterall.