Huge difference here, and I think this speaks to the subtle and subconscious ambience that shave spoke about in another thread: Silver Dollar City is a destination park that draws visitors of all flavors from many miles, while Frontier City is a local hangout and place to hook up with like-minded teens. The one thing that Frontier City, Worlds of Fun, and others have that SDC seems to reject is a sizable picnicking area or central location for corporate get-togethers. Those large business groups probably account for a great deal of their income every summer. Look closely with a distinguishing eye. SDC is vastly different in feel, look, and culture. If we are truly fans of SDC, we will urge it to lead others, and not follow the likes of the rejected third cousin wannabe of Six Flags.
My vote will always be to take a year or two off of the big expansions and completely overhaul the three classics: completely replace AP with APII, upgrade FitH with real audio and articulated characters and story elements and not cheap mannequins and fluorescent paint (as well as reinstate the inside queue so as to prologue the story), and take the shooting technology back out of FM (As the first "amusement" rides, FM and FitH should live as long as the City itself.). These overhauls, including the amazing replacement of AP would still look good in advertising and would still be marketed well to intended audiences.
At the same time, they really should look to expanding and improving craft demonstrations. These are, and should always be, entertaining little "shows" in themselves, unscheduled and surprising to people walking by. They are the nuggets that make SDC unlike any other park in existence, contributing greatly to the culture that has kept them alive for over 50 years.