I'm in two minds.
On the one hand, I'm not 100% convinced he's up to the job - of course I could be wrong, he may still wow us for 18 months. And I'd hope beyond hope that, free or otherwise, he wasn't our flagship summer signing. I'd take him as a semi-squad player on a free. Also, I hope we do not sacrifice Lukaku for him. Rooney and Barkley behind Lukaku may actually be entertainingly effective.
There is the aspect of his leaving - all water under the bridge for me now, notwithstanding how gutted and almost offended I was at his manner after leaving. It could also be a shrewd commercial statement to the outside world - we obviously do not see it that way but others might do.
I'm undecided basically, 70/30 in favour of having him back.