I personally think if a jacket has both front and back yokes, then it should have no seam on top of the shoulder, otherwise it seams too busy or make the jacket looks cheap (made with smaller panels to minimize material)
Really? And how many vintage jackets have YOU seen?I don't think I've ever seen a vintage jacket made this way.
just my personal feeling, I didn't refer to what vintage construction were made, because with thick leather I wish I moved the stitching somewhere else, as it hurts from its weight. so when there is a design elements like front and back yokes, I'll certainly skip the shoulder seam because it is doable though wasting more material (round cutout for neck, and 2 cutouts for shoulder) but it is doable, and I imagine would wear and mould better on the shoulder.I don't think I've ever seen a vintage jacket made this way.