As far as I'm concerned, there are not enough improvements for the shower, such as generators to regulate the temperature of the water or steam, something unusual that usually happens in the shower. Because I recently read a lot of new information here https://bathroomer.org/best-steam-shower-generator/ and realized that my shower can be upgraded very well, it has a lot of increased functionality.
You have something to work on, and I think you will make it beautiful.