Shenton reminds me of Gleeson (when he first came to Saints) in some respects. He doesn't have Gleeson's footwork, but he's more direct and maybe possesses half a yard extra.
I suspect Lomax and Gaskell are both right handed halves, which would explain Shenton's lack of service as he's on the wrong side. It takes time for young playmakers to develop a solid wrong-side pass - but it'll come. The return of Pryce should help as he can shunt the ball to the right with some zip.