This is where you make the mistake of assuming that "average gaffer" = "average consumer".The fact that you've enjoyed every single mainline Assassin's Creed shows that you are not the average consumer.
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I am pretty sure the average consumer enjoys these games, it's the "average gaffer" (if something like that even exists) who (usually blindly) despises everything that Ubi has done to the series over the course of the last iterations.