Question about the 2.0 zones in Endwalker

[Shurrikhan]

They can maintain the collision boxes. If you looked at the bubble between 3.0 and 3.3 there were a bunch of rocks jutting out that you could land and walk on, these rocks were removed and replaced by the external bits of Alexander after the cutscene where he stands up in 3.4.

I didn't mean it in a technical sense, but rather a question of whether, say, fixing up Ishgard could be done effectively even when limited to just reskinning the sides of buildings, rubble piles, etc. Such would be a pretty large design constraint if, no matter the skins, the collision boxes must remain consistent for everyone.