Ruthie's idea with the accent zip would work, but those kinds of pockets are not at all comfortable for actually putting your hands into them. I have some sensory issues with clothing, so I get it. Has driven my Mom nuts my whole life. And a jacket without usable lower pockets would drive me nuts.
Does the jacket have standard side seams? If so, it would be rather simple to add in seam pockets there, and they would be comfortable to use. Not seen often in Mens clothing, but quite common in womens, and they really aren't very visible. I wouldn't hesitate to add them if there is a side seam and they can be tacked into place on the inside behind one of the tucked "front seams", so that the addition will look finished. I use french seams on pocket bags like this.