I love how the generator works spends way too much time on it but I've noticed a few things that would be nice to have

Overwrite current design
Sometimes I stop halfway through a design and have to save it or I want to tweak a old design, but it's annoying to come back to find and delete the old versions you had of the design
Rename design
Sometimes I accidentally misspell the design name or forget a letter, It's a bit overkill to again find and delete the old version
Search by Design Names option (like username search)
I'm always curious what other people have for a specific theme but I really don't like clicking through a bunch of pages in hopes of finding ex. "Aurora" themed stuff. It's also a good way to get inspiration, just look up beach and bam a bunch of beach themed designs

So yup my suggestions

I support all three of these.

Yup, these would be very useful!