This will just look bad. You will end up with a jacket that's too short, or the pockets will seem too low. The perception will be that there's something off with your coat.
Again, the amount of taper cut into a coat doesn't matter if you're having the waist altered. Sure, Ned seems to get more of a tapered jacket than, say, J. Press. But if he cut that jacket from somebody with two inches less in the drop than you, then the coat is not going to be particularly tapered.
So you think RLBL suits don't look right with their low pockets?