[djsumdog]

The Netherlands do not allow dual citizenship, so simply allowing all the Belgians/Dutch to chose during an Enclave/Exclave swap wouldn't be possible.

It wouldn't be necessary really, as citizenship is more dependent on your parents. Both of them being EU member states also makes residence somewhat irrelevant too, except maybe with taxes.

[tremon]

The Netherlands do not allow dual citizenship

Are you sure? There are plenty of second-generation immigrants here that have both the Dutch and parental (mostly Turkish/Moroccan) nationality.

[magiconair]

My kids have both German and Dutch passports but that's because their parents are from these countries.