Personally I don't recall ever being impressed at all with Carlsson. Zero, zilch, nada. I remember wondering why the heck Torts was messing with the defensive pairings at the end of the season and that Carlsson did nothing to deserve playoff games.
You linked to an article where Torts basically said he's big, takes up a lot of space and doesn't worry much when he makes mistakes. It was not a glowing endorsement. Reading it now, what I hear is: big kid, makes plenty of mistakes, doesn't let it bother him. And forget what Murray said, do you really expect a teammate to say anything bad about a young kid on his team? I wouldn't.
Lastly, we as a fanbase ranked Carlsson 7th in our prospect polls (after his late season debut) on a not very deep pipeline. Sure Z, Douchebag and Bjorky were no brainers at the top but Korpi, Milano, Andy, Forsberg, Abramov, Bittner, etc. I'd say the fanbase here was not overly high on him.
And for humbling fun...our 15-20 included Gavrikov, Elvis and Peeke.
Blanks is different. At the end of the season I thought 'hey now, I wanna see more'. He flashed, gotta see if he can maintain it.