Instead of giving us yet more alien Nazis they had shown us an alternate history where Kahn and his superman had been victorious or visited WWIII. Doing so would have been in keeping with the larger theme of season 4 and fleshed out a part of Trek history that has largely been ignored.
Given the possibilities of the Eugenics Wars or WWIII, one wonders why the writers dipped back into the familiar and overused well of alien Nazis?