Black mealworms are dead mealworms
unless you have those weird black fast moving mealworms that i having breeding in my beetle bucket right now. Either way black isn't something you should feed the leos.
Large crickets/feeders can make a leo constipated, it happened to mine. She was only pooping once a week when i gave her a bath it took a month of baths to get her back on track.
Like yours mine ate ANYTHING i swear she would eat an insect bigger than her, more and smaller items is better
good luck