Personally, I wouldn't feed only frogs as a staple because I believe in the nutritional benefits of pellets, but if we had proper bullfrogs in NZ which fish enjoy, I would replace mealworms with bullfrogs. I've read somewhere before that bullfrogs are really high in protein, so one big bullfrog would probably be the equivalent of feeding 15-20 mealworms for the same amount of protein.
I don't think asian fish keepers even bother gut loading. I'm so confused lol! There are people who post pictures of awesome muscly aros and they claim that the diet consists of one of the following: superworms or prawns or bullfrogs. In other words, by sticking with one of the aforementioned as a staple, they have successfully raised great looking fish! But I can't justify feeding just one type of food every day - and I definitely won't stop the pellets. So theoretically, my fish on a balanced diet SHOULD exceed theirs in size (well, that's the hope anyway!)