I have a question concerning his practice, and please excuse me if this is a simple or idiotic question BUT:
This company has outdoor cages designed to let native insects in the cage for feeding, which in his words allows any cage hatched babies escape. Off the native/non-native population issue for a moment...
Wouldn't you be concerned with parasite infestations in your animals? You have no way to know what insects your guys are eating and would be a little reactive rather than proactive as to the knowledge of who is eating well and who is not which is one of the first signs of a distressed animal, isn't it?
And, yes, the more space and the more foliage you include the less you can monitor how each baby is doing. You will be introducing compromises in every group rearing situation. The only way to truly be on top of each and every baby's health is to raise them individually. There are a couple of breeders that are doing this. They are able to monitor each baby's food intake and hydration (via the consistency of the poop). It takes a lot of work, but it does pay off in the quality department. Check out the Panther Baron, a sponsor on this forum, for a breeder who does just that.