I think this season is very much last chance saloon for Iwobi. Benitez has generally played with number 10's who are almost advanced central midfield players, who have power but also some defensively discipline. It could be Iwobi, but it could also be Doucoure. This feels his chance to show some consistency. His best, and some may say only good game for Everton was also one of the few he played in that 10 role against West Ham game. It's a long shot, but I'm not sure he can do much more than play in that 10 role.
Unfortunately with 3 years on his deal, and a multitude of other problems, he will not be the 1st problem to resolve this summer either.