The map creator works really well in most cases. It's pretty nice. However, it still needs a few minor features.

1. Used room list: A list that shows which rooms and how many of each you've used.
2. An "Are You Sure?" question that pops you if you hit the delete button. I accidentally deleted a map because I hit the delete button. There currently is no way to get deleted maps back.

Yes it is obvious

Nice.
Support.