Our attackers shouldn't though, with a competent midfield and a little more work from our wingers it's very workable, especially against the smaller tems that sit back more, I'd like to see us sit deeper at times against the big teams as we did against Barca but in general it's fine. Incidentally, Kos is very well suited to this strategy actually, as he has decent recovery skills and reads the game well, Merts lack of pace could be an issue but as long as we stay organised he'll fit in fine.