I agree with the numbers or rather lack of regarding US pilots.
The number one reason for most us to go home is to be close to family and raise your kids close to grandparents etc.....
I would do the same if I had similar opportunities at home.
America is the other side of the planet to DXB and so the travel time during leave takes up a good chunk of your vacation.
Also, the american pilots here are concerned about the IRS.... their income here may be paid tax free but Uncle Sam feels that it is not tax exempt.
A number of American pilots here are very nervoius..... even Cpt. America has gone home.
(Cpt. America: Finished last week)