An important point missing here:
Americans still...STILL... feel "bigger is better". True, though in the core communities noted understand the difference offroad, BUT, the same people in the communities are a rounding error on a tally sheet listing the total number of possibe sales - or sales needed - to make a model practical to bring here.
These are extremely hard message to market in the US:
"Smaller is better; less engine capacity is what you need; 450 cc is enough for everything you need to do"
Outside the US, the message was learned a LONG time ago when insurance companies started tiering coverage to engine size...
We live in the land of bigger is better, for better or worse...and when it comes to midsized dual sports, I'd say we're worse off for it.