With respect, I really don't understand the fuss over freeze-dried bloodworms. I think they are fine and have more than enough nutrition.
In his book, Aquarium Care of Bettas
, aquarist David Boruchowitz writes:
"Freeze drying is a process in which water is removed under low pressure and low temperature that preserves much of the original nutrition and palatability of food organisms."
In her book, Aquarium Care of Cichlids
, aquarist Claudia Dickinson writes:
"Freeze drying retains much of the original nutrition and taste appeal, but in a much more convenient form."
Neither author says anything about them causing bloat.
David Boruchowitz has been an aquarist for over 60 years and is the editor-in-chief of the magazine Tropical Fish Hobbyist. Claudia Dickinson is a life member of the American Cichlid Association, where she serves on its board of trustees and managing editor of its publication.
It is based on this information that I feel freeze-dried foods are fine. Whatever deficiency freeze-dried foods are lacking is made up in a variety of foods. Feeding a variety is the most important factor for good nutrition.
Why Hikari switched their formula is a mystery so yes, it's certainly not of the best quality anymore. But again, feeding a variety will make up for its deficiencies and the pellets' very tiny size make it easier for bettas to eat, as opposed to a larger pellet like Top Fin or Aqueon.