How many come to the games by train? I manage a handful of home games each season and get the train to Kirkcaldy and Stark's Park is pretty convenient for that, short walk from the station and can stop somewhere for a drink too, if I wish. Any move to the edge of town would likely mean me having to drive or get a much earlier train then try and get a bus. (Assuming they wouldn't put on shuttles...). (One positive of relegation is I have four "away" matches a few miles from me....)
Not that there's any money to do it, but I think Stark's Park could be redeveloped to improve the match day experience (with or without an artificial surface) rather than needing to move. Reopen the Railway Stand / close the Main Stand for starters. If we had money, (and a decent architect, who Sim says he's speaking to) I'm sure you could even get some sort of seating in the terracing in front of the Main Stand (or replacing it...). Changing rooms and offices could be put in the North Stand.
As for Sim, too early to tell (for me) until we hear more. Comments made saying it's a positive move or a negative move both sound sensible for the reasons given!