I have went through season 1 of your edit. This work was very well done. Unlike Clone Wars, I have only watched a few episodes of Rebels in the past, which makes most of the material new to me.
Season 1 was very entertaining and well done. This was a show meant for children and came across as adult friendly 99% of the time. I never felt like I was watching any filler, and the character development clearly was maintained thus far.
I am not sure if musical score was added, but I liked how it was incorporated whether by the editor or original show creators.
The only minuscule “issue” I found was that there were a few moments where there were some clear choppy cuts. I could tell that something was obviously cut, but I do not really consider this that much of an issue. The 3 or 4 choppy moments I noticed lasted less than a second and I would much rather see a split second of choppiness as opposed to a bad scene and/or bad dialogue.
When it comes to this show, I feel that both this show (and Clone Wars) are better viewed in episodic versus the movie format. It works much better. If somebody wants to watch this show again or for the first time, this is the edit to go with that sticks to a solid story without the fluff.