All the manufacturers claim their freeze dried food retain most of its nutrition value.
I have no way to confirm their claim.
No need to be shy on the amount of food you keep for your reptiles.
I also overdid (yes, I realized it very well) it after I ordered many different brands and types of fish food for my fish from several different online pet stores. I have dozens different food for them just because I read it online that a variety of food can ensure a more balanced diet, since each food can't have every needed nutrition.
I even made a chart on what to feed on Monday, what to feed on Tuesday, etc. You got the idea.
Not exactly sure how much differences it had made, but I surely feel better when I feed different food on different days of the week. I only feed high quality food from the best brands.
When you say you keep the worms in stasis almost indefinitely, do you mean they are able to stay alive for a very very long time if you keep them in the fridge? Do you need to feed them at all?