I think that both of those points are debatable.I think they should even if it's just a very limited production, people will still buy them and people will even view Lincoln in better ways.
people didn't buy very many of them the last time that Lincoln tried this out. And with the F-150 being so strong, I'm not sure it makes sense for Ford.
It follows that if people didn't like the last Blackwood and didn't buy it, if the same thing were to happen with a new Blackwood it would diminish Lincoln's brand image.
It is not necessarily a bad idea, but i think that Lincoln would be extra cautious if they did end up doing it.