We are talking about the present. Frost has more upside than OMac. If we wanted to trade Omac, we would have to throw in an extra player to get the deal done.
At the end of the day we need to make the right decisions on the list. Frost is better than McDonald but we will get a better deal for frost than the former.
The way some posters post on this site you'd think nobody would be good enough to play for melbournefc. Probably dangerfield or paddy cripps wouldn't be good enough.