No matter how it is implemented, get your fm2 for 5 years and then go for imigrado. You can't go wrong with this method if this is your goal.
The changes are being made behind the scenes and none of us are affected, yet. When we will be affected, I have a very strong feeling that life will be easier.
Of course, if you want any upgrade, you can always skip to the front of the line with a good lawyer and buy your way in. That method still works.
"À chacun son goût"