I think it works pretty well. I’d definitely show this to someone not interested in watching Rebels (although they should, lol).
Personally I’d be interested in a movie (or miniseries?) focused on the Kenobi/Maul arc from Clone Wars and ending with this. It would be a cool way to include that stretch of story in a marathon viewing when you don’t have time to even watch Clone Wars Refocused.
In theory, it could work as a movie, basically the core of the whole story consists of 6 episodes of TCW and the epilogue from the Rebels. It’d be ~120-130 min long.