The following species are legal in Florida:
Blaberus discoidalis
Blaberus craniifer
Eurycotis floridana
Panchlora nivea
MALE Gromphadorhina portentosa
Pynoscelus surinamensis
Roaches tend to have roughly the same nutritional value across the board; though the actual meat:shell ratio and composition of micronutrients will vary. All of these make for possible staple feeders.
I would recommend Blaberus discoidalis (discoid roaches, false death heads) for Blaptica dubia replacement. Similar size, similar reproductive rate, and do not fly or climb. The only major difference is they are not sexually dimorphic like B. dubia.