Doing my best to objectively look at what RM is looking for out of his wingbacks, he is looking for energy, trickery and pace.
It is early days yet but I think Ogbeta looks like he might fit that criteria, he only had a brief cameo for about 15 mins or so against Birmingham but he was making the right decisions and he looked dangerous. I think that him and Obafemi will strike up a good understanding given time on the training pitch and in actual games - the crosses that Ogbeta put in against Brum were screaming for a near post runner and were to be honest all right on the money. Obafemi has the strength and pace to make those runs.
The right side is a bit more problematic, Christie definitely has energy and some pace (though not electric pace that's for sure) but he lacks trickery when he isolates the defender in my opinion. Finding a player that fills all the criteria that we want on the budget we have however is difficult, you will be hard pressed to accomplish that on either side let alone both.