I was recently reminded of the fantastic “100 papercuts” project and I would really love to see something similar again. It would be very fitting for a LTS cycle
I think the Canonical developers have their hands full fixing critical bugs, so this would have to be a community effort.
A papercut is defined as:
"bugs that will improve user experience if fixed, is small enough for users to become habituated to it, and is trivial to fix.”