This is exactly my problem with this storyline.
Hank might be my favorite original X-Men (though I love them all), but I would be perfectly fine with a villain arc for him if it were done well.
But where are his closest friends to confront him? He's been Bobby's best friend for half of their lives, did they just lose touch once they moved to Krakoa? Even if Percy doesn't particularly care for those characters, the story almost writes itself, one would figure it would be a no-brainer.
Jordan White's interviews are fairly illuminating, as he seems to allow the writers a lot of freedom as long as they include enough characters that sell comics.
This may also explain why we get so many stealth solo comics: writer wants to focus on character A, White requests the inclusion of characters B and C for sales, writer complies nominally but doesn't really weave them into the story, White does not object.