I'm in the opposite camp actually, I'm actually enthused that there was any rise in attendance(in the second quarter). This whole movement should pass over in the coming years. Shares may be down by a lot, but they will definitely rise as long as there isn't as much negative press and good announcements to follow.
As a big SW fan, I'm ecstatic to hear about all these announcements that we've got coming. I'm not quite sure exactly what these big plans are that the SeaWorld podcast is referring to, as I don't know exactly what it could be. I know for a fact that they will announce their new Sea Lion show. I suspect a potential refurbishment of Wild Arctic, which is long needed. A suspended theater would work perfectly. Kinda like Soarin at Epcot. It definately is a possible refurbishment plan given Europe in the Air at BGW and SeaWorld's close ties with Falcon Treehouse. However, it would probably be hard to market considering the two attractions would be pretty similar and within such close proximity. The only possible things I could think of are refurbishing Journey to Atlantis. Blue Horizons is getting pretty old too(9 years strong!), I heard one of the employees say that it is the best rated show in the park so that means it probably be around for as long as the Clyde and Seamore show that just left had been.
Aquatica definitely has some potential for expansion. I would like to see something like Stingray falls at Aquatica SA in that park, especially considering the two current family tube rides are kinda eh and tucked away in the back. Some completely unique water attraction that combines animals and thrills would be awesome since Ihu's Breakaway Falls doesn't feature any animals as far as I could tell. Lastly, Discovery Cove will probably not get anything because they got a few expansions just a couple years ago even though in my opinion, the park does just need one more attraction.