He used to be a top-four calibre player.Sean Walker is not a top 4 defensemen. Stop being delusional.
He just plays on the Philadelphia Flyers so mediocre looks great.
Yeah, he was bad last season coming off injury. And was a natural candidate for LA to move to clear cap space. But he's had a really excellent start to the season for Philly. He certainly could help a playoff team right now, and Philly should look to monetize that.
It's okay to update your priors when new information arises.