Ok so I thought of this while anserwing another thread and decided it deserved it's own topic.
KI we all know your shopping district is a bit lack luster now. You could add a fishing shack which works similar to the bazaar but for fish only. People could bring their unwanted catches of the day there to sell for gold and others could have the option of purchasing them for crafting etc. You could also sell a new variety of craftable items which need fish to complete. There are many things you could branch from this such as crafting fish mounts, fountains with fish, or even a certain pet. Just something for you to consider.
I saw your answer to the other thread (I was in it) and that is actually a great idea. They added that house tour place in the commons by using a building that used to be unable to go in, so why can't they do that in the shopping district (or other area)?