I believe WDWs water parks will stand on their own merits (or not). VB is more about extending the stay at Universal (or even a Uni only trip) vs taking attendance from TL/BB. They might grab some locals from aquatica- but I don't even think Aquaticas numbers will be that impacted. VB seems as if it is tailor made for on-site guests.
At TL-,Shark reef closing sucked. But at least they've gotten crush n gusher and now miss adventure falls. That's 4 really good slides right there that hit both ends of the demographic spectrum.
Whereas BB is just constantly struggling to keep their slides operational- whether it be their premier drop slides or these basic ones.
BB is going to need to do something, as its reputation is starting to diminish.