I had a look at these two versions of Sunset Valley, and I really liked what I saw. It's nice to have a version of SV that doesn't stray too far from its original character. Well done! I haven't really played anything yet though. Here are just a few remarks and questions that came up when I looked at the town.
Regarding the FAQ, it actually makes a difference if you use the fixed version of the SV world file with an old save that used the original version. While the routing fixes won't affect the old save, the altered terrain will, which results in buried roads (for example the road to Pinochle Pond or that at the original Science Facility) or height differences between roads and lots with terrain steps. It's better to switch out the world file when loading an old savegame, although this is more an aesthetic issue than a real problem.
Also, the NRaas mod is called Retuner, not Returner.
When I had that quick look at the world, I noticed a couple of minor glitches.
The dive bar has some floating artifacts (only visible from below). These can be removed with the hammer tool in build/buy mode.

At least for me, Sunnyside Strand had lots of floating roofs without supports, one of them glitching into railings:

I noticed the fusion lounge was sitting too low. Was this done because of routing issues? Otherwise, I'll just remove it to the library and replace it.
Regarding the stadium, does this have extra functions compared to the original?
I found the resort hotel already somewhat laggy without people on my somewhat ancient machine. It's looking great though

. I have IP, but have never played there. Is it possible to replace all the towers by rugs (not a request, but a question)?
Oh, and is there a list of which residents are new? I haven't really played all worlds I have yet, so I'm not sure about which are new - aside from your simself

.
Anyway, this is all minor stuff, and I really like what I see and am looking forward to playing in this world. This looks like a labor of love

. Thanks!