Spinsanity has been open. It went down at some point AFTER opening so something seems to have gone bad. Tsunami Soaker was announced to be closed before the season even started. And Mooseburger has only been opening for events with food components (IE. Oktoberfest). If they move the food component of an event somewhere else OR don't have one at all then I'd be far more likely to say there's something going on. Using Mooseburger for themed food has been pretty consistent the last few seasons it would indeed be notable if they DIDN'T this season.
As for what should, might or might not be afoot - I'd build a new restaurant. I know, I've already said this before. Something akin to what Cedar Fair has been doing for a while now. Removing Mooseburger, the French bathroom and Tsunami Soaker gives you a nice area to build something new (but you can build a nice one even just using the Mooseburger footprint alone).