Locker room issues? I'm just speculating.
It's been spelled out pretty clearly, if you read the thread.
To recap:
Schenn is a natural C who hasnt been able to solidify himself as a C at the NHL level, and plays best at RW. We were playing him at LW because he was buried behind Simmonds and Voracek on the RW.
A good portion of Schenn's production came from being a net front presence on the PP, a role which should be fairly easy to replace (he took it over from Hartnell when we traded Hartnell)
In two years, when Lehtera's cap disappears, the Flyers will need to resign Provorov and potentially Simmonds. Moving Schenn makes the latter a possibility.
Flyers have Linblom coming over from the SEL this year, who will likely get a crack at the top LW spot and likely, the top PP, if they stick with 4f, 1d.
Flyers only real needs at this point, for the entirety of the organization, is young forward prospects (D and G are both covered, Patrick helps, but he won't be enough on his own). This trade lets us move a non-core player that we should be able to replace, for two first round picks, which the Flyers draft well with, generally.
I don't think it's a slam dunk win, especially if you only look at the context of the trade. But it's far from a bad deal.