I don't have a problem with him not being a natural winger, there are very few around and many attacking midfielders have been effective outwide, it's nothing new, players like Pienaar and Modric have proven that.
But Bilyaletdinov honestly looks like a Frank Lampard type player playing outwide. A player who can pick a pass, has good control and is intelligent on the pitch. He doesn't look comfortable when he has to pick up the ball and carry it, even when he's cutting inside. Pienaar is far from a byline hitting winger, but he has the agility, movement and trickiness to make a nuisance of himself. He's quick thinking and mobile.
Bilyaletdinov doesn't seem to have any of this, or at the moment, he's not showing it. I think he'll be a good player for us, he's certainly a good footballer, but I'm not convinced it'll be as a winger/wide player.