With Howe, Scharenberg and Goldsack on the list i'd be comfortable trading out Langdon. I like Langdon but I don't feel he will ever develop the kind of urgency he needs to take his game to the next level. It's not just when disposing of the ball but he gets caught out of position often and doesn't have any hustle to make it up even when he could make it if he was desperate enough.
I feel given his current numbers and form he'd appeal to a few clubs like Melbourne, Essendon, Saints and Gold Coast. I reckon we could get a second rounder for him which would be quite handy for us and assist the rebuild. We're already strong by his position and could easily draft in Sam Walker or Hore as cheap replacements. Both those guys add footskills to the equation too.
So essentially you'd like us to go backwards again? Put 50 games into a guy, have him there ready to become a player (or not) and then give him away for a pick in the late 20s early 30s? Horrible list management, especially when you consider the fragility of Scharenberg and that Goldsack is nearly done.
We will forever be rebuilding. If u like him, back him in and be confident he will make the necessary progression. That's actually what all good football clubs do with their young players.