I thought that they dropped the nationality requirement because it just forced people to change their citizenship for their employer. It was simply too easy to work around the requirement.
My opinion is that jumping citizenship would be a blatant attempt to subvert the rules, and I'd hope that a threat of a rule 69 action might discourage it.
Perhaps...but you are either a citizen of that country or you are not. There's really no other measure in between unless you want to drop back to "born in". (wrote a song about it)
