I agree with Fycus, toasty the shoulders seam appears to be a little too far in. Body fits fine though. Sizing up will make it a little looser. Is it easy to zip as-is?
Aphelion, if you don't plan on layering you may want to size down. Can't tell from the pics whether the shoulder seam is on point. Also, instead is shortening the sleeves consider just rolling them. The jacket's about being casual and rolling is definitely that.