I don't think Smith and Gaskell could play in the same side so we'd need to choose one or the other for next season - Smith is the better player now but Gaskell has more potential upside. On balance I'd risk keeping Gaskell and letting the pies have Smith.
...and I still say it's a depressing sign of the times that a club like Wigan has to rely on so ordinary a player as Smith as their main playmaker for the next few years...