I have the same problem with the shoulders on my gis--the light ones because they are actually the heavy canvas bujin carries, and the heavy (judo) gis. Of course, my shoulders are not very impressive on my own. Not one to point out that an instructor has just said something that makes no sense, that 'your shoulders are too high' comment would make me wonder if they were actually looking
at me, as it would make my arms long enough to reach my knees while standing at attention. Once one of them went to push down those 'raised shoulders' and crushed the empty canvas. I was very tempted to scream 'argh!!!! my arm, my arm' but overcame it.