Hi,
As per this thread, I can confirm that “opening files with a % in their path or name” is (partially) fixed! 
Selecting a URL-enconded filename doesn’t crash Shotcut anymore (but no item is added to the playlist and no error message is displayed)
This might give you a hind on thats going on: if the file is hard-linked, then the URL-encoded filename can be used. Example:
11639368 -rw-r–r–@ 2 me staff 987383205 Sep 9 20:18 formacionpm.17.m%c3%b3dulo-iii—encuentro9 on 2022-09-09 20-15.mp4
11639368 -rw-r–r–@ 2 me staff 987383205 Sep 9 20:18 formacionpm.17.módulo-iii—encuentro9 on 2022-09-09 20-15.mp4
(first entry works fine and is loaded as the second one. Guess that the “open file” dialog uses i-node as the key…)
Features tested:
“Press Esc when the dialog…” works and, whats even better, doesn’t cancel fullscreen or tiled window modes.
“Added the ability to drag-scroll/pan using the middle mouse button…”, works using PC mouse’s wheel
Too newbie for most of the other new features, sorry
Version: 22.09 (22.09.01)
Code Type: ARM-64 (Native)
OS Version: macOS 12.5.1 (21G83)
Thanks for Shotcut!