Honestly, I think New York isn't exactly the only place that makes sense for Marvel Land in the sense of theming.
Ironically enough, it fits in quite well with DCA, because of the Solo Films having connections with the state of California (Pym Tech/Wakanda = San Francisco/Oakland, Stark Industries/Captain Marvel = Los Angeles).
I think New York would've actually made quite a bit of sense for a place like WDS. And to be real, I don't think it would've affected anything for the "story" that they seem to be going at.
That said, the only major things that do have relevancy with New York and Marvel, is the Avengers HQ (Which is off-site in the outer area's of the NY State); the NY branch of the Mystic Art's; and the former Avenger's/Stark Tower (along with Spider-Man being all around NY).
Does that mean New York may get more in the future, due in part to F4 and X-Men? Probably, but they are more than likely looking to the area's that have had the most in the context of the MCU for now.
As far as Hong Kong goes..it screams more to me that they are going with the Worlds Expo/Stark Expo style for that than any of the others.