Hey treebird,
thank you very much for your feedback. Since November 2018 a new version is available in which we were able to include most of your feedback.
The blue icon is most likely the demand for families which you can see in the upper-left corner. If the icon is displayed above the room you have no demand for families and have to pay for advertisement.
The other ideas will be included in a later version if we continue the work on Oddly Assorted. If so, then it will be in the midterm of the year.
Thanks again and I hope you had fun with the game.