It can be argued against as there are some important attributes he brings that we lacked for years.
He stretches the play to create space everytime, all our RWs used to move centrally as starting position and clog the midfield. We played with no RW for years and our pass map used to be hilarious with no RW at all
He is always option to progress the play, works incredibly hard and helps his FB almost all the time.
Ofcourse that's not enough as he should be doing more in final third, especially at creating chances. Right now he does all the good job and then cuts inside to play pass to attacking mid position or the overlapping FB. It isn't bad thing but he overdoes it.
His performance are nowhere near as bad as you and others are making out. Right now he isn't backing himself to play killer pass, when he does it there won't be much issues with his play.