I think the concern inside SW should be about the Busch Gardens parks and SWSD.
SWSD's numbers in 2017 were 3.1 million and down significantly from 2015 and 2016 numbers around 3.6 million. That park needs stabilization or at some point, it'll have to be cut loose.
The Busch Gardens parks had been a source of strength through the Blackfish-related attendance declines, but those parks have likely experienced attendance declines in the past 2-3 years. Based on a variety of articles I've seen on the subject, declines in annual passholders appear to be the biggest problem for those two.
SWSA is probably the strongest park in the group; that one appears to have completely healthy attendance/financials. Significantly less regional competition + markets that weren't affected much by the Blackfish issue.