So, if you think you might charge thousands and thousands on your FB AMEX card, it might make sense to switch. Otherwise, I would keep your address in NL, especially if you are already 6-7 consecutive years as Platinum and only have a few years to go to qualify for Platinum for Life.

As far as I know, NL is one of the few countries that also allows you to give two family members their on FB AMEX card with the same FB status as yours (even though no level miles earning). This can be a very useful benefit to gain lounge access when traveling in economy with your family.