Colors etc look great!
However I'm not sure if the GH5 fits within the 'small camera' category
What aren't you happy with, may I ask?
I have to constantly Manual white balance, If the sun goes in or out,and if the sun angle changes you have to readjust your settings.It doesn't work in Auto mode with accurate colors. Its just a lot more work then my previous Video camera. I don't understand all the settings or where to set them at. I spend more time adjusting settings then looking at the marine life. The plus, it takes awesome video when its set right, its lighter then my video camera.