To me the funny thing is that the grip angle and overall profile of the grip is the least expensive part of the Glock to manufacture. They could keep the same mag and still make the grip a lot
more acceptable. Many places take the grip and mod that empty space behind the mag to get the backstrap more vertical. Then they fill in the bottom of the front strap and bingo common grip angle. Several others offer complete Glock frames for pretty cheap so, if they can do it, Glock could certainly offer frames w/ 3 grip angles if they wanted.