This picture is gorgeous. I prefer the crop as well, the flare I have mixed feelings about.
Normally, lens flare especially one as small as this,doesn't bother me, but this one can distract. I'll explain why I feel this way a bit later.
I didn't even notice the "cool" feeling until it was pointed out. So, I spent some time trying to figure out why it seemed this way because it wasn't immediately apparent , and thought I'd share.
Apart from that big dose of flare, there's little to suggest that the sun is going down. It could be a digital thing but this looks a little too "sterile".
It seems each of the main areas are separate from each other: sky, treeline, pasture. At a near equal distance from you, and the sun, but on the other side of the photo from the flare is a green pasture. My thought process went something like "that flare sure is red over there, why isn't that pasture getting any of that red cast?"
If there was a continuous treeline, that maintained an approx equal distance from you, I don't think it would come across this way.
However, this part of the pasture extends quite a distance past the trees, and I would expect the sunlight to bleed into this area just a little bit, but it seems the clouds are blocking/diffusing the sunlight right in that area. Because of the flare, and because of it being pointed out, the lack of sunlight is more apparent.



