I think Allen will prove to be a really astute signing in the long-term, and improve our midfield in the short-term. A 91% pass success rate and the third-highest tackles statistic (110) in his first season in the top division for a 22-year old lad is a quality output, and despite it showing the tight-knit unit that Swansea F.C. were last year, his individual talent is obvious. He clocks in at 36 league games played, indicating (for the time being) an injury-free consistency to his game over the course of a season, which is important for the base of (younger) players the squad is developing around - Reina, Skrtel, Enrique, Lucas, Henderson, Suarez and Borini, who all appear pretty resistant to the niggling injuries encountered frequently across a season. For the now, I think Allen's midfield slot is pretty obvious: right in next to Lucas, with Gerrard pushed towards the forwards, enabling ball retention, passing tempo and dictation of play, as well as positional security and the midfield pressing as a unit.