Unfortunately, the same problem exists with the Garmin G3X as well. Not sure if there is a 3rd party film that can be applied to either unit, but at times, it really sucks
 
My Ifly 740 was like a mirror. I found some film on Amazon that reduced the reflection by about 75%. I don't really want to apply the film to an expensive Dynon screen.

I don't know about the other MGL products, but the XTreme has no reflection and that tells me there is a way to make a screen non reflective without loss of detail or brightness. I have mine set at 80% brightness and prefect visibility in full sunlight.