I agree, the Greg Pak and Thom Coker story was a punch in the gut. But it's a different type of story than the Invaders story. The first is a done in one short story, and the other is a long form story, more like a novel or it could be even a trilogy. Unlike the Pak story, we won't see the whole shape or get the full impact of the Invaders story until at least the arc is done, and maybe even the series.
I'm just thrilled to have TWO great Namor stories in one day. I can't remember the last time that happened.