Looks like some improvement & some not so improved.
Bolt on rear foot peg brackets are a BIG improvement as they can now be removed so the frame doesn't get bent during off-road encounters.
Still needs a much better windscreen.
Still drastically needs a higher front lower fender as mud build-up will jam that front wheel & stop it from turning very quickly . (I was hoping the new 850 would have this addressed)
Moving the chain to the side stand side is a big downgrade in my book as that makes chain service much more difficult if the center stand is removed for off-road clearance.
Some of the engine fueling mods sound like a good improvement as the old 800GS's had very snatchy throttle control.