Thanks for updating us on his diet. After the meal worm question I thought you might be looking for some more help on this topic.
Diet is first and foremost the most frequent question and cause of confusion and frustration for new glider owners. There is a LOT of information out there. The Gliderpedia tab above has a great overview of the 'approved' diets. These are ones that have been researched and found to be successful over many years. Take a look through these to get an overview of them. Candy, a member here, also has a website that details her own feeding plan and has links to the other diets out there.
gliderkids-diet.com/Staple-Recipes.html
She will be of great help in explaining the details of diet issues in gliders.
To answer your more specific question. Of the diets on the approved list (including Candy's) none is really "better" than another. It is a matter of what is best for your convenience in cost, ability to get the supplies and prepare. And also, how well your gliders prefer the diet and thrive on it.
The BML is the MOST restrictive diet in that it must be offered exactly as written with NO substitutions. The staple is very high in calcium which is the reason why the fruits and veggies are limited to those in the recipe, which balance out the ratio. The BML staple has the protein that your glider needs already mixed in, notice the chicken, etc. No other protein is needed to be offered. The diet is complete and if followed exactly as written it takes any worry and guesswork out of the equation for you. It is essential that you only use the exact brand of supplements that the diet calls for. You can offer small treats along with BML, yogies, mealworms, etc. but do not alter the actual nightly feeding.
It is often the "go to" diet for those just starting out on their glider adventure because of the ease of being able to (usually) find everything needed to prepare the diet in one trip to the grocery store and a trip to the pet food store.
Take a look through the diets listed to get an overview of them. Maybe one might stand out to you more than another. Several of them have much less restriction on the fruits and veggies and a large variety can be offered.
Whatever you decide, it will be your and your gliders personal preference. Your glider will need to get on ONE of these diets though, as you have been sort of 'winging it', but keep offering the baby a tablespoon (he's probably too young to eat all of it) of fruits and veggies, a protein such as plain (no oil, salt, etc.) chicken chopped finely, plain full fat yogurt until you decide exactly which plan you want to use. While deciding...do NOT add any sort of supplement (vitamin, calcium, etc.) to what you are feeding.