There's ways of hiding him in terms of his inability in the air, especially with a master tactician like Benitez who will always do his utmost to hide a players weakness and amplify his strengths.
I do agree that it's different to doing it over a long season than just a few games but we'll see how it goes, from a personal point of view i'm good enough with him to the point where i'm confident if he has to come in and do a job for half a dozen games then i don't think he'll let you down too often. But i would probably like to see a new RB with Anita as backup.