He doesnt create chances
He doesn't pass forward
He doesn't tackle
He hasn't the pace to track runners
He's a complete passenger - the perfect English international midfielder of recent years - sideways and back "keeping possession and doing nothing with it".
I'm not going to argue the defensive aspect of your criticism.
But on offense, the things you are criticizing him of doing are literally his job.
Not to oversimplify it, but his job is to provide an outlet to the CBs and Allan and pass it to Digne and Richy on the left and James and Decoure on the right. He also provides an outlet to those same players. Pretty much, he just sprays it around and helps maintain possession. That is his job and a vital one.
He won't score or assist much but neither do most players in his position in this formation. Toni Kroos being a good example and no I'm not comparing their quality, but their role.
In the 4213 formation that you suggested, the 2 wingers better track back to provide relief from pressure and you also sacrifice Decoure from being a true box to box. He will have to stay in the midfield for the most part.