Why not fully support all ARs?
Who says that Assassin's Creed doesn't? According to WSGF standards, it supports 16:9, 16:10, and 4:3 by way of anamorphic behavior.
I find it amusing that you start to mention artistic decision as well after the whole BioShock fiasco.
I actually never mentioned "artistic decision." But nevertheless, the argument is believable for Assassin's Creed when it wasn't for BioShock. If a dev truly felt that only one aspect ratio was appropriate for their game, they would letterbox it on less than 16:9 AR's so as to keep the focus on the viewport they intended. Assassin's Creed does this, and BioShock does not. It's more than reasonable to assume that the devs were careful to preserve an "intended" AR.
I think we have to decide whether we say "yeah this is close enough to what we want" or if we continue to strive for excellence with our DR and grading system.
I say we continue to strive for excellence by grading Assassin's Creed according to the same criteria we've developed over the years, and used to grade previous games with similar behavior. This game was certified two years ago:
http://www.widescreengamingforum.com/node/6243
Nobody saw anything wrong with its behavior then, and AC is only worse in regards that it has a bug affecting some widescreen resolutions.
And lets not forget about our TH2Go friends ...... It's hardly a perfect solution for them!
Sucks to be them, but considerations for TH users are outside the scope of WSGF Certification criteria for a number of reasons. If they want to start their own separate criteria for testing, reporting, grading, and certifying TH -compatible games, I won't protest.
Anyway, if you have more to say about anamorphism, I ask that it be in a new thread on the Insider's board, because anything more than can be said on the subject won't be about AC any more.