My uneducated thoughts.
We turned Neale (pick 54ish?) Into Hogan.
Lachie Weller (pick 16?) Into pick 2 (Brayshaw)
Chris Mayne compensation into BHill which could then turn into 2 × 1st round picks.
If we were player 'flippers' we would be investing super stars.
Having 3 x 1st round picks(replace Bennell, Kirsten and Ballas) plus what we get for Langdon is an absolute win as far as I can tell.
Players will always leave, its what you get back that is important.
Bhill leaves then it's time for Giro to step up. He's got the engine.
An ACL can destroy a players pace, look what it did to Palmer.