This list seems innacurate though... off the top of my head I'm pretty sure we got Sy Snootles and Barada during POTF2. I'm no Vintage expert though so I'm probably wrong.
Their reasoning for Sy Snootles is that the figure we have is a representation of the Special Edition CG Sy Snootles whereas the Vintage figure is of the Sy Snootles puppet. I can totally understand this since the CG model looks nothing like the original puppet - but I can also understand Hasbro's stance on why we're only ever going to get figures based on the new CG version of the character.
For Barada - what they're saying is that the Vintage figure was actually of
Kithaba, whereas the cardback artwork AND the modern figures we've gotten are of the actual character named
Barada.
Personally, with how great they've done with the Wooof (Klaatu) figure, I'd welcome new versions of Weequay, Barada, Skiff Guard Klaatu and also a truly updated Kithaba.
Like JTA even points out in their article, they had a hard time deciding whether or not to view the Death Squad Commander figure as "done" - personally, I say "no" - but I know the whole "the uniform was black/dark olive/gray" argument. So to me, if you're going to say Barada/Kithaba hasn't been done because of a yellow shirt and red pants, you have to say the Death Squad Commander isn't done due to the gray uniform. (but again, that's just my opinion)
I think there's always going to be a handful of figures that are questionable and argued over, that's just the nature of the hobby and I think the longer Hasbro keeps the Vintage Collection going, the better chance we have at finally putting to bed many of those arguments.