Fates is an odd entry in the series. Birthright has just boring combat that is just way too easy. Conquest is actually pretty good combat-wise. And Revelations just has a lot of odd, unneeded mechanics that are used once on a single map and never again. Birthright also has a boring story, Conquest has a terrible story, and Revelations is pretty ok. The characters are fine, but they suffer so much from being written to be one-dimensional. All characters have one or two goofy traits that take over their entire personality.
Final score: 6/10