Glad it helps, Reely. The FAA is a large government bureaucracy and has problems like most, but sometimes they do things that make you look twice, because you expect something to be more complicated than it is.
The idea of the flight review isn't just to see if you can handle the controls. It's more about seeing if you know airspace types and weather requirements, read the symbols on a chart, understand PIC if more than one pilot aboard, etc. The instructor has wide latitude on what to test you on. You can see that the items above would not be specific to a given aircraft type. I can't really imagine how cumbersome it would be, and expensive, to do an annual review for any airframe you're qualified in. I've long been a renter (SFH) pilot, so might fly a half-dozen different planks or helis in a year. I could not afford to retest in each.