Welcome to Hacker News. And what a post for your first post, too :) Omniclip is already at the level where I could have used this for a recent project, for which I had to inset a video inside a slideshow (I ended up using pymovie, but it was time-consuming without a GUI to help me align everything). As for feedback, I think an undo system could be a good next feature. I really appreciate that it's FOSS!
Yea I couldnt dream of better reception of this project after so much work I've put into it... not even expecting. There aleady is undo/redo if thats what you mean, its on timeline panel