Solarhaphaeriom, Have the hips let out from just under the arms to the hem on the side seams to see how much it will help the vent issue. If you have the vent closed they still need to let it out on the side seams. When they open the jacket, ask the tailor if they cut the center seam outlet right above the vent and hope that they didn't. Shortening won't help in any way. Until you know how doing this helps, no need to worry about other things yet.