#1 Stukov's reanimation and de-infestation will always be a blotch on the SC lore record (not that it's otherwise perfectly clean), because of how random, trivial, and anti-climactic it turned out to be. Fans feel this way and Metzen has admitted Blizz staff do as well.
Shouldn't they at the very least attempt to justify all of that by doing something interesting with the character now?
#2 Just think... he's THE ONLY known UED survivor still among the Terrans (there are others, but he's the only one WE know/care about). He's one of, what, THREE known characters to have ever been infested? He's THE ONLY person to have been successfully de-infested.
And you don't think there's compelling stories to be told with a character like that?

What is it like to be infested? He can tell us. What is it like to be deinfested? He can tell us. Is he happy the ordeal is over, or does he secretly yearn for the days when he was "perfect" before he was 'saved'? He is potentially one of the most interesting characters in the SC tapestry at this point, not only because what he's been through in the past, but because of what that should mean for him in the present. It'd be a shame if Blizzard didn't take advantage of that.