I'd personally move Violet to plat, Ulric to Gold+, and Seraphina to Gold+
Violet outclasses a lot of characters in sheer damage output.
Ulric is amazing and I sigh everytime I have to face a good one, but I see characters like grimnr and galen more than i see him used.
Seraphina is some kind of borderline case I believe, I have used her with some success but I don't find her OP. She is very frail and doesn't pose any threat when she doesn't have her OP basic attacks up.

I really love the new list format, and I feel like with Gold+ and Gold- it is much more balanced than the previous list, well done! I agree with all other champions!