Ben,
Yes very excellent results! I must say I am also still very partial to Sunset at Utah Lake as well, and I actually like the original a little more, as to me the faster one seems rushed, especially compared to the music.
On this one, it is very nice. The colors and motion are very good, and the pacing seems right. The music works well too. Really a top notch TL!
As far as the music goes my 2 nitpicks are that I would still like to see the music fade out as the video fades out, and it would also be nice to see a music credit in the time-lapse somewhere, even if it is not required by the artist whose works you have licensed to use in your video, unless that information is simply not available to you. In this case, I liked it and would be inclined to look for my own music from the same source and/or same composer if I had that info.
Now on the technical side, a few more questions:
1) Not sure what you mean by a time-lapse in the R5? I assume you took stills and then post processed them into a video in Photoshop?
2) I have read some stuff from some serious time-lapse folks that advise not to use auto ISO, although my small amount of experimentation with it seem to show it does work well. It certainly seemed to keep your exposure right on as the light was fading. Is the ISO the only thing that was changing in order to keep exposure locked in?
With these results you are going to be teaching us all how to do this soon enough
ML