To be fair, I don't think there's anything more you can do with Wigan other than try and keep them up, and have the occasional good cup run.
I guess but they have a few decent players (Kirkland, Heskey, Scharner, Palacios, Valencia, R.Taylor), a few more shrewd buys and they could definitely be a midtable team. Depends if Whelan is prepared to get his chequebook out.