Neat, but does't seem to understand context very well

I've been playing around with Adobe Firefly today, annd while I really like it and can see the potential, it has also proven to be quite frustrating, as it doesn't seem to understand context very well. I signed up for the Firefly monthly plan. 100 credits didn't seem like a lot, but I figured it would be enough for a trail month. I uploaded a photo that I wanted to edit and started playing around. Certain things were easy, like changing eyecolor. Other things the AI just didn't seem to understand, such as adding facial hair in a particular color. I tried adjusting the settings to align more to the prompt vs the source image, and it didn't really seem to matter. I've now burned through about 75% of my monthly credit allotment, on just the one image. I've tried other photo editors, such as Canva and pixlr, which seem to understand prompts better. However, Canva specifically warns against using on faces, which is specifically what I was looking for. I'm hoping Firefly will improve over time.