There’s a very recent new suggestion focusing specifically on the option to support commercial detection/skipping for recordings in progress.
Comskip can scan for commercials and create the edl file before the recording is complete. It would be great if Plex enabled parallel scanning for commercials so we can begin skipping commercials immediately. This will also speed up commercial scanning since. it wouldn’t need to wait until the end of the recording. There should be an option to enable this.
With all individual bullet points of the OP being addressed in other existing suggestions, I’ll close this thread as a duplicate. I recommend everyone interested in those features to comment/vote in the respective thread.