Well speaking of the remaster: I watched a few scenes. Some of the backgrounds look really nice now. They looked great before, but the increased resolution here really does them justice. Unfortunately, the characters don't tend to fare as well from what I've seen. The areas where the upscaler(s) got sloppy are pretty easy to spot: lots of blurred lines and muddied faces in frames that weren't drawn as cleanly as others and/or were trying to fit a lot of detail in a small area.
It definitely isn't a replacement for a proper ATLA remaster, but it's still cool to have since a proper ATLA remaster will never happen.