To address a few of the things brought up:
I don't think there is any worry about the park being open weekends only because the festivals are only on weekends. Lots of parks, much bigger more premier parks, do festivals that run weekends only. Takes lots of extra staff to man the booths. It COULD be a way to get more locals to the park IF they ADVERTISE it to the GP and have some really good food booths and drink specials, etc, etc. Our park doesn't always do a very good job marketing to the masses.
I have been on JL and in my opinion it is better without the 3D, clearer. At worst I don't think a lot of people will even notice a difference in picture quality. And yes I believe it was a chain wide thing.
Thunder River went down for a mechanical issue around a month ago and they pretty much knew then it would not come back in time for this season
The ride op that lives in my house has said that they are "supposed" to add trains in time for FF so hopefully only a couple more weekends of one train ops. Although I agree it's disappointing that they didn't have them for a holiday weekend.
As far as Boss, I had it on very good authority that there was a firm plan to RMC the thing before the virus that shall not be named struck. Do with that info what you will. Is there any chance now with the new CEO? Probably not, at least in the near future, but I really don't know where it stands at the moment. I've been butt hurt ever since they removed the helix.