I believe Petruccelle was being floated as a makeweight until the Rioli saga. Brander and Allen are, of course, the other potential steak knives.We're not trading Yeo, Shuey, Darling etc. and guys like Petruccelle and Nelson really aren't that valuable.
Reminds me a bit of our Ottens trade, where we did lose a first-22 player at the time in Moloney. However, that was very different as Ottens was a rare commodity - Kelly is a better player, but mids are a dime a dozen.