I wouldn't miss him and I think PSG would be very generous to give us the opportunity to recoup most of his fee with the season he's had. He could well improve, yeah, but we already overpaid and to get all, or most of it, that back would be an offer we shouldn't turn down for me. He hasn't gelled with his team-mates, he seems to have a cold relationship with LVG, he hasn't settled in England and our system, and if he has another season like the last one (which is just as likely as him hitting the ground running), we'd be lucky to get north of 25 million for him.
I think we can do better if we re-invest that money. A versatile striker who can play on the wing (Griezman would be my pick) and a CB and we're looking absolutely superb.