He pushes the team forward, and on the days when he does play well and is involved I'm still amazed at his energy levels. Running full pelt at people in the first minute, still running full pelt at others in the 89th. Yes he could be better or score more but I'm not too concerned about the lack of goals because his interplay with those around him is good and creates danger.
Having Shelvey, Townsend, Gini... should hopefully mean potential threats coming from different areas and allow him more space.