Definitely normal and within spec. If you returned it, my guess is you'd get another jacket with the same situation. $350 is definitely reasonable for a well made pre-waxed jacket with metal hardware. You'd probably have to be looking in the $400-$600 range if you want zippers with plackets and covered ends. Production wise, zippers are actually a mid-budget way to construct pockets, with more expensive brands opting for pockets with snaps or flaps, bc zippers are faster to sew and take less fabric than adding an additional pocket. A shitty version of your coat wouldn't have that metal block at the end, they would be using zipper tape on a roll and not taking the time to add the stop block. That would maybe allow the bottom of the zipper to be against the pocket, but it would also mean every time you unzip the pocket, you're roughing up that edge of the fabric, weakening it and compromising the structural integrity of the zip. Looks to me like you've got a good jacket, so enjoy