I'd say you are a little, only a little "armsy." It's tricky because you use a rather steep plane which is ok. It just makes the appearance of being more armsy because again, it's steeper.
I would say that maybe a little backswing work and some pivot work. You do take the club a lot to the outside which means you have to find a way to reroute it on the downswing a bit. However you get away with it cuz of the steeper plane.
Again, i'd say some pivot work and maybe a little plane work.