UAE has been fielding teams full of Indians and Pakistanis for the last 50+ years. Even after this much time, they can't get a single national to represent their squad. So there is no point in saying that making teams 100% comprised of foreigners will have any positive impact on the popularity of cricket in that particular country.
The reason is simple, the Middle East community do not love to play Cricket but majority of them are die hard Football lovers. To find players from national community there should be some interest and it is lacking and the next aspect is the payment they get playing the sport.
The same can be said about teams like Hong Kong, Germany, Norway.etc. Then there is a second category, comprised of teams such as Denmark, Netherlands, Japan.etc. These teams used to be comprised mostly of natives. But now they are also moving towards 100% foreigner composition.
Netherland has some good players and to attract new members to the sport they need to see it as a sport that will provide them a good future especially financially and until then you will not find a huge pool of talents.