Yeah, the alt WWII stuff is increasingly leaving me flat. I don’t even bother to page through the new Turtledove stuff anymore.
The Birmingham “Axis of Time” trilogy started ok, had a great second book (allegedly heavily edited by Eric Flint of the 1632 series) and then sputtered to death in book 3. His first two “After America” books were pretty good, but the third really sucked. Guy just doesn’t know how to lay out a multibook series in a way that’s consistent and brings it to an effective/coherent conclusion.