@frd @eugenialoli @nielso I haven't used it in a project for a bit, but a couple of quick things that come to mind are closed captions, and comprehensive keyboard layouts built in. I know they can be found online, but they should be available, and of high quality, immediately after install. Adaptive playback resolution in the timeline monitor would help as well, to improve performance. I find myself setting up hotkeys to continually switch resolutions to make it more responsive.
As you can see in my earlier comments above, the work being done on Kdenlive is amazing, and it keeps getting better and better. There is a bright future:)
BTW is there a good, official, place that users can submit feedback or even test features to help the community?