This is a hard one for me to critique because I'm not a photographer, and there aren't enough elements under your control in this type of piece for me to judge any decisions you might have made. It's also one of those things where I had to ask myself if this was merely just a picture of a beautiful natural event that speaks for itself (thus essentially making it the artist here instead) or if there was more to it than just that. I ultimately decided it was still indeed artistic on your part because of the decision to include the road and scenery at the bottom and the way you decided to frame it.
So as far as the framing and non-sky elements go I think you did an excellent job. However something still doesn't quite seem professional about it, and I think it might be the number of extra elements in the piece that distract from the aurora focus. Some lighting tweaks in some areas might remedy this, like I feel that the horizon may be a bit too bright. The road also looks like there are car headlights illuminating it as well. I like the lights on in the house up on the hill though, I think because it feels like its observing the aurora, but there is just something about some of the other elements that makes the piece feel a bit cluttered. I'm still not a photographer though, so I could be completely wrong, this is just the way I feel about this particular piece myself.
The silhouette quality of the road and the hills between you and the aurora really make this picture more fantastic. There's a lovely hint of narrative and going somewhere but then of seeing this epic display in the sky. As far as the rule of thirds and everything it's fantastic, the mix of colours is just breathtaking. Obviously you won't have picked those yourself but great job for capturing it and framing it right. Glad you took long enough to get all the stars in, really wonderful detail showing up all over this. The level of light you have sets it apart along with the road being part of the end image.