Well it could be influenced by the soft worms, but superworms should make up for it. Have you seen any blood in it? How often/much does she eat greens? How often does she usually have a bowel movement, has the frequency gone up?
If it's been just the last 2 bowel movements, meaning both yesterday or one the last 2 days, I wouldn't worry yet, as you said it could just be the change in diet or the softer worms. However, that will pass by her next poop if it's the cause. Her next poop should be more normal, then the next pretty much normal if it's caused by her food change. I'd say if her bowel movements don't normalize by tomorrow, or if you notice any additional issues like lethargy, loss of appetite, vomiting, etc. then you need to get a fresh fecal sample to an experienced reptile vet ASAP because it's most likely a high coccidia count, worms, or a bacterial infection in her gastrointestinal tract, and she needs a proper fecal test and diagnosis, proper antiparasitic or antiprotozoan medication, probiotics during and for a few days after the meds, and her enclosure and everything is it completely disinfected with either F10SC or bleach so she doesn't keep reinfecting. Keep her separate from any other reptiles and wash your hands with antibacterial soap both before and after touching her or her enclosure, or the feeder insects.
