He deserves player of the season so far IMO. At least it's very close between him and Youri.
He's played 5 different positions/roles this season and done well in all of them - RB, LB, RCB in a 3, RWB, LWB.
I think he's surprised us all by just how good he's been this season, and I'm really excited to see how he continues to develop.
I'd have him and Ricardo as our first choice full backs for now, Castagne on the bench.
My only downside I will throw in, which isn't really a criticism of him, is that I think he's better and more effective on the right than he is on the left - as are Ricardo and Castagne from what we've seen so far.
I hope we keep Justin at left back as with how he's developed this season I'm sure he can continue to grow in that position too.