I think that if you purchase a tile you should be allowed to sell it, put it in vault or be credited for the amount towards another purchase, if you should change your mind on the look of the casino. Reason is, all the other items can be sold and I purchased some tile with cp cost and then upgraded my casino, only to find out the skin of the casino does not match the outside tile. I haven't even opened the casino and am already losing out!
Also, it would be nice for more creative freedom to add half squares in the tile so we can make designs and even pictures in the tile. We also need more tile colors. Maybe a HTML color chart to all tiles so we have more options and can be more creative. Maybe you could also add a raffle for those with more creative tile and casinos to win CP. Giving people reason to make their casinos look extravagant. Possibly a monthly or weekly raffle.
I would also like to see more options for walls: pictures, wall lights saying bar, restroom ect., custom designs we can create with a paintbrush to paint on top of the pain and wallpaper we choose.

We need more choices for Avatar, more outfits, customized outfits with HTML color chart, long hair and not in a ponytail, High heels. Also the boots when trying them on do not go over the pants, I think we should be able to choose if we want the boots the go over or under the pants.