Well if he's going to play them all he probably can't play 2 strikers (that 442 diamond I described earlier looks a little unbalanced and I can't see Ricki using it) so why would he be pursuing Porter by your logic?
Easy - play Porter (new signing) instead of Coveny (not a new signing). If we play 2 up front they would be Smeltz and Porter (if in fact he is signed).