While I wouldn’t say that Dorney is perfect, I have found it to be quite charming recently, and their Haunt event has houses that rival what we experience in Florida. I think, perhaps, you are being too harsh.
I'll get back to SFGA in a second but I think the best thing Dorney has going for it that helps the charm is their coasters 'breathe' in that they are spread out from each other. When that happens you can really fill things in nicely. I feel like too many Legacy CF parks built coasters on coasters with entrances almost right next to each other and then you need those large footprint queues it kills charm.
Anyways back to SFGA:
Echoing what Nicole said, I’d also add that the people less upset by these moves are that way because we’re hoping the money saved will be put to use on more than just a giant shiny money pit coaster. I’d actually hate if Falcons Flight came to Great Adventure, because I’m hoping the park takes a similar path to KD/KI.
I think what's tough about this situation in both ways though (experience vs cost) is that taking down a record breaking coaster and replacing it with a record breaking coaster might not be the return they were hoping for.
We're kinda seeing the issue (IMO) that existed during the coaster wars - everyone, especially CF (now SF), is so locked in on records, records, records; that what most people want is being missed. You want a full day escape with the family from the norm to forget about life an enjoy yourself. Like one of the complaints many (rightfully) BGW people had was the jump in height from Grover to InvadR to everything else was so big, and too many flats were coming out, that a large swathed age of kids had little to do in the park.
IMO that's what SFGA is in danger of having happen for real. They are going to lose a large amount of their middle group. Those 6-12/13 year olds that are going to be too 'mature' for kids only rides but not big enough for so many other coasters. So if that's all you have to offer and you keep losing flats, those families will start going to places like Dorney since they do have things that reach that demographic.
Now in the end, I get it. They took out Kingda Ka, so you
need to replace it with something iconic. But I think it will run into issues (sorta like Volcano and BBW) where the ride was so iconic that it's tough to truly have its spirit carry on. But what SF needs to hop on fast IMO is filling that area they put this in at with a theme, flats, stands, and make this section of the park feel alive.