Interesting to see that SeaWorld is continuing the Flicks & Fireworks on Fridays and Saturdays (plus fireworks for the in-park guests):
A spectacular ending to your evening with Ignite 360 fireworks. Enjoy this nightly fireworks and fountain spectacular that brings the brilliant colors of the sea to the skies above the park
seaworld.com
And Busch Gardens is bringing back the Summer Nights fireworks for Fridays, Saturdays, and Sundays:
Feel the spark after dark at Busch Gardens’ Summer Nights, featuring a NEW laser and fireworks show, tasty seasonal eats, and extended park hours to coast through the night on Florida’s best thrill rides every Friday, Saturday and Sunday from July 17 to August 16.
buschgardens.com
I guess they've decided to spend money on fireworks to try and lure/keep people in the park on the weekends rather than spending to get their new attractions open.