Malzahar Model & Skin Rework
I've played a lot with Malzahar
recently and I really think he needs a skin and model rework. Not a FULL rework, just high-res textures and a better model (his face model, to be exact).
However, the thing that bothers me the most is the Shadow Prince skin. The splash art depicts him along with golden magic swirls, however the in-game spell particles are the same with the classic skin (still purple).
If I remember correctly, Battlecast Xerath had the same problem: one thing on the splash art, different stuff in-game. I sincerely hope you get to rework Malzahar.
TL;DR : Shadow Prince skin needs to have golden particles, not the classic purple particles.