The EU and NA servers have made threads available on their forums for you to type your opinions in so they can gather feedback.

I’ve played 9.15.1 and honestly, I’m not very satisfied. The game feels almost like the graphical settings reversed into 8.0 patches, especially when it comes to the mini-maps. I’m usually okay with changes but the game right now looks washed out, it doesn’t feel right at all.
Also, mini-map dimensions are really retarded right now.
Note: I did checked the SEA forum but they still only have the old feedback gathering for previous patch.