Well, on that last point, it depends. If you're fine with GAdv being the Discovery Kingdom of the east coast, then sure, I suppose the park doesn't really need to do anything outside of general improvements going forward.
Not catering to enthusiasts is to be expected and is completely reasonable, but most of the coasters that have been added since 2006 have been poorly recieved by the general public. I agree, GAdv was a huge draw back in the day because there was so much to do. Now though, with the surrounding parks only getting better, along with the removal of six rides at once, that isn't exactly the case anymore, and attendance numbers show that.
Take a look at GAm. They've added four original coasters, none of which were clones or relocations, to the park since the bankruptcy. All of them have been very well received by their visitors. We're talking about the old company here, the same one responsible for GAdv being as far gone as it currently is. What exactly has stopped GAdv from making similar additions? Is it that hard to build a unique coaster to replace Ka instead of something that will likely get cloned at other parks? (The survey for Kings Island had them adding a 200ft version of that same shuttle tower)
Yes, I'm being pessimistic. But alot of my anger comes from years of watching other parks add unique attractions and seeing this one routinely do the bare minimum. No, I don't think the park will ever die, but I have a feeling that it isn't going to be as high on the food chain in the eyes of CF as most people wish. I'd love to be proven wrong though.