The upgrades to Alsace are very noticeable, not just that insane cobblestone rollercoaster, but also the reeds in the lake, and the moo-cows. Seems to be more buildings making it more villagey, too.
I was surprised to see almost all new trees at Kyoto also, though it is odd to see no pink flowers (they were cherry blossoms, right?)
Lastly, there's massive improvements to the long-distance scenery of Interlagos, and Bathurst looks more stunning than ever, stoked to have the beautiful star map back, I'll have to park on track for a while to see if I can actually see the milky way past midnight, though, bit of a shame there's not as much user time control as in 5-spec-II and 6.