I remember, a good few years back, speaking to a couple of Wimbledon fans in the Burrell, Haywards Heath, who said that they were moving their support with the club to MK.
I didn't really have an answer for that. It was a short conversation.
It would probably have been better, atmosphere wise, if the South Stand was opened. The North Standers and The MK fans in the same end (separated by stewards) would have created some noise. (Not sure how much but more than yesterday)