I understand that as long as the jacket fits goes around the shoulders and length wise, I think the rest could be tweaked easily. Am I correct? Since, I read around here that doing anything with the shoulders requires a major alteration and isn’t cost effective either.Your mileage might vary. I'm "stocky" - you have to try it on and see how it fits. That being said, altering down is easier/more feasible than letting out (as you are always limited by how much seam cloth is available.
I don't remember being them particularly short, but again, YMMV. I'm 5'9" (1.75m).
Where are you based? Do you have the opportunity to try some of these at a store before purchasing?
I am based in New Jersey, US and have no idea if there are any stores near me that carry these brands. I haven’t seen these at Nordstroms, NM, or Saks.