I personally think that POV cams are less than ideal for MA but I'll see what I can offer.
First, it is rather apparent that your stance is too narrow (I think we can all agree on this one). I understand your frustration when you hear this criticism. For some reason, this is the one habit that a lot of intermediate/advanced skiers have a hard time breaking/giving up. I think this stems from the fact that you spent years training yourself to ski with a narrow stance and now everyone and their mother is telling you this is wrong. Nobody naturally skis with a narrow stance; it is something that we teach ourselves over time because we think it looks better. I instruct a lot of beginners and very rarely do you have a newb who starts off with a narrow stance. In fact, it is usually the opposite. Many beginners start off with a stance that is too wide. This is because a wider stance offers us better balance and stability. It also enables us to "steer" our skis, something that is virtually impossible when our skis/knees are touching. For what it's worth, try widening your stance. Place a balloon between your knees and try not to pop it or drop it. There is no doubt that this will feel uncomfortable at first, perhaps even painfully frustrating. But the reality of the situation (and this is physics talking) is that a narrow stance will prove to be terribly limiting if and when you opt to start skiing "extreme" terrain (and I'm not talking about anything you will find at Breck).
Second, from what I can see looking at your shadow, it appears as though you are rather hunched over. Try standing up a bit taller. This will help help you to initiate your turns by releasing your edges simultaneously. Also, try not to look at the tips of your skis. Not sure if this is something you are actually doing because I can't see you, but it sometimes goes hand-in-hand with being hunched over. As you stand up taller, shift your visual focus away from your skis and out further in front of you.
There are a lot of other things you could work on, but so could everybody (myself included). If you really want to improve your skiing, start by widening your stance and standing a little bit taller. If you just want to look cool to gapers, than keep doing what you are doing.
P.S. I have a pair of 2012 Shoguns and I absolutely love them (aside from the cap construction). IMO they hold up GREAT on groomers/hard pack. Try carving some turns on-piste and let me know what you think.