Hi Viper,
As a Southampton season ticket holder, I can confirm that in reality The Saints played with a 4-2-3-1 formation last season:
GK Artur Boruc - (right to left) Nathaniel Clyne; Jose Fonte; Maya Yoshida; Luke Shaw - Jack Cork; Morgan Schneiderlin - Jason Puncheon; Gaston Ramirez; Adam Lallana - Rickie Lambert
Boruc passes out short to the centre backs; the full backs raid down the flanks and cross high to Lambert; Lallana and Puncheon both cut inside and play one-twos; Cork is CM defensive with Schneiderlin box-to-box; Steven Davis can operate in any of the three central midfield positions; Jay Rodriguez is often sent on to play as an Advanced Forward, with Lambert dropping to Deep Lying Forward in a 4-4-2. Sometimes Rodriguez starts on the right. The team passes short and usually presses the opposition high up the pitch.
Dejan Lovren is a new signing at centre back, probably to replace Fonte. Wanayama has come in from Celtic so I would imagine there will be a higher rate of rotation for him, Cork and Schneiderlin.
I think Shaun Maloney would be an excellent signing for Southampton. I was really impressed with him last season, despite the fact that Wigan were relegated, and I think he is well suited to that style of play. Clint Dempsey would also have been a good signing, so I'm disappointed to see him going back to the US. If you want to develop a 4-4-2 system or introduce a Poacher, perhaps someone like Jermaine Defoe would be a good signing, particularly if partnered with Lambert. Though England's newest hero isn't getting any younger either, so you might try to tempt Benteke from Aston Villa (or Lukaku from Chelsea if they're crazy enough to loan him out again). Andrew Surman of Norwich City (MC/L + DL) might be a useful squad player and as an ex-Saint would be motivated to sign for the club. You might also consider James McCarthy of Wigan; Chris Brunt and/or James Morrison of West Brom; Josh McEachren from Chelsea. My dream signing for The Saints would be Bastian Schweinsteiger - but I'm not sure that even £28million would get him out of Bayern Munich!!