Frostwraith
The Demon King
That song. =O
X stage when
I love it. Seriously, the Xenoblade X soundtrack is a reason why I'm such a big fan of Hiroyuki Sawano's music.
Not to mention his anime soundtracks, but I feel his work on Xenoblade X shows off his versatility the best.
A great Xenoblade X stage would be one that showcased the 5 continents of Mira.If there ever was an X stage, I'd love to see Noctilum personally.
Think something like Lylat Cruise. Characters could fight on top of a bunch of mechanical platforms as it travels through different continents, showing off the scenery and wildlife. Of course, NLA could be seen during the passage through Primordia.
Noctillum on its own is not bad at all, especially with a day/night cycle given it's the XCX equivalent to Satorl Marsh from the original Xenoblade.
As for music, well, along with the several battle themes and songs like THEMEX, they could include this fantastic track that plays in Noctillum: https://www.youtube.com/watch?v=cDqmmLaSYyo