It is my understanding that the way the Polish Church dealt with these people was irregular to begin with--namely, cessetion of communion with no canonical penalty. What exactly does that do to the person if you don't depose them but you break communion with them? highly odd. From what I read, the Portuguese bishops certainly did a lot of very odd things, and might have deserved to be censured, but this is not the proper way to go about it, because any other synod could just bring these bishops in.
Given the tension between Russia and Romania in Moldova, I wonder if in fact the MP is trying to get a stronger foot in the door, and since the breakaway Moldovan Church is in communion with the Portuguese (I think?) maybe they come along as part of the package? All speculation on my part.