I pretty much agree with you, MoS. There was a lot more to be said, at least regarding the Priest & Hudlin stories. But I do have a few comments:
Priest:
I am not surprised that there was very little T'Challa, because the story was ultimately about how the rest of the world sees him. I also spot a bit of metafictional commentary from Priest, not only with Ross moaning about how he doesn't do this sort of thing anymore, but also with the way everyone in the story seems to think that, despite the fact that they haven't interacted on panel in decades, T'Challa would _naturally_ have Ross helping him out. The characters (aka the fans) don't seem to have recognized that T'Challa has changed.
McGregor:
Damn, that's some wordy purple prose. I can't help but wonder if he's taking a subtle potshot at Hudlin with the cancer thing, tho.
Hudlin:
I expected a twist at the end, because things were going too well. I'm not sure that the implication that he had to
Spoiler (click to reveal)
kill Iron Man
was enough, tho... I half expected the whole thing to be some sort of holodeck recreation, and Wakanda was actually in ruins. This was certainly more optimistic, but somehow less satisfying.
Of the three, I think only Reggie's tale is one that I really want to see more of. Priest's was more of a nostalgic "where are they now" sort of thing, and McGregor's was, frankly, almost unreadable.