It's something rurik has touched on many times, how football is evolving towards more technical players taking the positions tradionally associated with the hard working grafters. We're certainly an example of that, as are City, and Arsenal have always tried it. For us, Lallana and Wijnaldum are both left wingers, but they're operating incredibly well as a midfield three with Henderson and we're causing lots of more tradional midfields problems as a result.
As a side, I think it's part of the reason Mourinho is struggling so, football is getting more technical, and teams are better suited to deal with his well disciplined defensive football as a result. But then, maybe I'm just searching too hard for a reason to label him as a tactically backwards fossil.