Some items are just not worth using in a casino and it's hard to justify an item with stats like 0.6 trophy appeal (block stacks) or Chinese barrier (2.7 trophy appeal but taking up 3 squares of floor space so 0.9 per square) for use within a floor design in the game when it will take up space that could be more profitably used by items with much higher stats (dragon column (15.2 trophy appeal and only 1 square used)

We are seeing more and more casinos being turned over to floors and floors of neon poker tables with a few high trophy appeal items in to maximise profits

A major tweaking the stats to items within the game so they become more balanced / relevant to use will allow a whole variety of items and designs to be used

Too many items have stats that are so low, they are pointless keeping and get deleted if found in a bomb, or in a newly purchased casino from the RE Office.

(That's before you even get into the whole they will never pay for themselves due to the high purchase prices for items argument like a green slot costing 5 cp, which is about 450k at market price taking nearly 211,000 hours to make back it's cost at 2.3 chips per hour and that's without breaks taken into account)