Hi,
Although I can not find it, RMC showed something like 26 different types of switches back in the 1960s. It was what got me interested in handlaying switches.
RMC mentioned that (as you have) the gauge separation "switch" as not being a true switch. The RMC article said that if it had a point or stub in it, it was generally considered a switch. So a draw would be a switch IF it had a moving point.
The RMC article called the 3-to-4 (or 4-to-3) rail gauge change before a turntable a switch also.
My personal opinion is that they are all dual gauge switches even though they do not have all gauges going all ways. Otherwise it gets too confusing as to proper names.
Doug vV