Cities Skylines Organizer Trays and Card Holder

I created some basic Organizer Trays for Cities Skylines Board Game.
Because i tried to keep the organizers rather flat, tiles have to be stacked instead of simply thrown in. The card holders are designed to work with sleeved cards (which i don't use, so feedback is appreciated).

If you have any suggestions or ideas how to make them better, feel free to comment. I'll be happy to make changes.

Have fun!

EDIT: Since i received Feedback (thank you, very much appreciated!) that the original design with 32mm height is a little too flat, i made a second version with 50mm height. I've also widen the "thumb-slots" for the card holder, to make them more easily accessible.