There is a big code refactoring going on and after that multicam is on the roadmap. There is also a project to rewrite the titler. I am sure any kind of input is most welcome. You can use the irc/telegram channels as well as mailing list to contact the team.
I would definitely get in touch. I'm not following the project closely, but they have lots of things going on. The refactored timeline got merged just today which might have regressions that weren't caught. Sometimes they hold IRC meetups for people to chime in: https://kdenlive.org/en/category/cafe/
I wonder if they deal with closed captioning, titling, synching with a VTR, multicamera, drivers for video I/O cards, proper file parsing (depending on things like FFMPEG is not such a great idea), etc.