I've always loved the series for its settings; historical authenticity meets aesthetic appeal--and its gameplay; a uniquely fluid way of exploring said settings. AC, though padded with travel sections, weirdly paced, and weakly cast, was a fresh new experience. ACII gave us a colourful new time period, a more engaging cast, and a whole bunch of shiny new gameplay options; it was a notable improvement over its predecessor.
Brotherhood was a $60 expansion pack. Ezio got a beard, a crossbow, and some spiffy Roman digs. And that was about it.
Brotherhood did get some things right, though. It actually had a clear antagonist! Cesare was introduced early and dramatically enough to give us a visible goal to work towards. And Ubisoft really got the most out of the time period with this one; political intrigue and assassination with Machiavelli and the Borgias? It ain't AC3, but I'll take it.
The setting of Revelations is new and unique, but so much of the new gameplay feels superfluous and, frankly, ridiculous. Hookblades? Really? We've turned the series' most iconic weapon into a coat hanger so I can reach 6" higher and steal Templar wallets? Terrific. And I know when I think 16th century Ottoman Empire I think "ziplines"! Also, thank goodness every body I loot, every chest I open, and every city my order captures gives me more bombmaking materials--for a second I was worried I would run out of awkward-to-use non-lethal equipment.
Revelations's story is filler. ACII had Ezio avenge his family and find his place in the assassin order. Brotherhood had him take down a nefarious and powerful threat to his entire nation and rise to a position of leadership. Revelations has Ezio dicking around--in an albeit beautifully imagined Constantinople/Istanbul--with no real emotional investment in most of what's going on around him.
Desmond has never been anything more than a tepid framing device. Oh, I see--it's okay if I fuck up on a mission because I'm not actually master assassin Altair Ibn La'Ahad--I'm a vacant-eyed noob from the future pretending I'm master assassin Altair Ibn La'Ahad. So my fuckups are really Desmond's fuckups, not Altair's. Thank goodness that potential 4th wall breach was handwaved away via 2 hours of the least interesting gameplay segments in every title.
Oh, and thanks, Ubisoft, for always stopping just short of making the modern-day story the least bit compelling. Holy shit, what's going on?! What am I seeing?! Who is that glowing chick?! Is Desmond actually going to contribute something to the plot this ti--oh, the credits are rolling now. Huh. Well, guess I'll have to buy the next game.
At this rate Desmond should be ready to star in a title of his own by the time the next doomsday scare rolls around.