We are getting more and more SH, I think a big change is required.
Instead of 1 use only for each decoration. It should work like the mount/companion/pet as decor, make it 1/per SH. Some of the decor also have very strict maximum use.
Also I hope for most of the CM decoration, once you unlock one, you can pay certain amount of credits/CC to purchase another instead of making some pack dropped decor price too high. Especially rugs are way too expensive.