GoPro 3 Black Edition exposure concern?

Maybe I need to spend more time in the menu system of my GoPro 3. I haven't used it a lot lately and it's been a bit of a "point and pray" camera. I've gotten some images I really like from it... But not without some post processing. While I'm ok with that, I'd love to get the overall images "out of camera" a little better.

I realize that the shooting conditions I'm in are a bit tough to get a good shot when you have a camera on manual and time to analyze and "figure out the shot" so I guess a camera attached to the bar grabbing a shot every 2 or 5 seconds (forget where I set it) isn't really doing all that bad of a job. Most shots are a bit under exposed while under tree cover.

Anybody else experience this with the GoPro 3 while getting started with it?

(Small inset photos are RAW and the larger zoom is post processed.)