This one sleep deprived idiot came to me on DMs with this screenshot
Having done this stuff for years I knew right away those colours are in BGR, hex values in increments of 2
Once translated, it came up like this, the second one I used the "gold" and "red" colours at the bottom.
First thing I noticed is that the order is backwards compared to the games, so I flipped the image vertically and made a comparison gif
(don't mind the brightness change, different programs preview colours differently)
Observations:
The "gold tone" remained in place green tone was redone to flow better rather than have this awkward aqua tone. it was also moved to the other palette line.
Line 3 was redone dramatically likely to account for the palette cycling, hence the chaotic nature.
Enemy palette received a green set and a red colour, the olive colour remained, index F remains unused.
The pink/magenta tone is gone, replaced by orange and red.
The notes mention a blue grey which is what was added to the background palette.
It mentions "B-Scroll" at the top but most of that line was used on the foreground, not background.
...dude says he's sick of looking at Pokémon stuff yet doesn't respect it when I say I'm sick of Sonic stuff.
This small part did catch my attention however, seems there was some plan to use Shadow and Highlight mode at some point.
For those unaware, Shadow and Highlight mode allows for stuff like this:
QUICK EDIT : comparison between beta and final palette: