I have dutifully played the Assassin's Creed games as they've come out, and while it has wobbled a fair bit on the line of quality, it's basically a solid series. At least it doesn't churn out exactly the same tired thing every time. Just mostly the same tired thing every time, with some new ideas dipped into like a cowardly schoolchild dipping a toe into a frozen pool. Some of the new ideas it introduces mysteriously disappear in future instalments, never to be seen again, like bomb crafting and tower defence in Revelations, or all that sofa manufacturing business in 3. While other, less shit ideas grow and gain confidence. I wouldn't be surprised if sailing was only in AC3 in that vestigial and ancillary way as some kind of proof of concept for AC4, in which case, fuck you, Ubisoft, for making us pay to be your focus testers.