I believe you may be over-stressing about this issue. For juveniles it is recommended that you feed them everyday and adults every other day as you probably know. I have never raised juvenile WTFs so I cant tell you exactly what you need to know but it sounds pretty normal to feed them 1-2 a day, nothing sounds crazy wrong with that. BTW you should be able to feed juveniles small crickets (smallest size you can get at your pet store. As long as you make sure that you are feeding your insects good nutrition your frogs will get that good nutrition and then they won't need to eat a crazy amount of insects. I feed my crickets stuff that has vitamin d3 and calcium, and i occasionally dust my crickets with calcium. I believe what you are doing is correct and I though I'd just say this because no one else is responding to your post. Plus you haven't said anything about them looking unhealthy so just let them eat what they want I guess, but don't let your full adult WTF eat anything or else it will become obese XD!