Wasn't the Professional Development League started just a season ago? I think it is going good but we need to wait and see before jumping to conclusions about completely replacing it.
If the new system does get implemented, I see the B teams of clubs like Chelsea and United playing in League 1...
He could start by giving atleast one game to a few youth players, like James Wilson and Andreas Pereira, in maybe the Hull match. Would do them some good.
I am certainly expecting Arsenal to take the FA Cup, watching Wenger lose out on even that is something I would not like.