I was about to open a new issue for work I have done which will implement a greatly improved method for something already implemented in Sage (twice, both by me...). When you click on the button to create a new issue, there are three categories listed: Bug Report, Failure Building from Source, and Feature request -- plus a catch-all "blank issue".
Surely my situation is common enough to warrant an additional template, called (say) "Improvement on existing code"?
Also, there should be something for upgrading a dependent package.
Meanwhile I'll use the blank issue.
John