Alpha Centauri
Restricted
It doesn't lessen the greatness, but it's also letting the directors off easy to say "Judge it without comparison.".
Why the Hell should we? It's...an adaptation of the books. If Zack Snyder came out and said "Don't judge this compared to the books.", I'd say, "Don't make it then.". To me, that's just a ridiculous idea.
I've always said that Watchmen could turn out to be a "great" movie in "its own merit". As in "It's great, but not as good as the book.". However, this book was made with the purpose of not being able to reproduce in cinema, it will not be as good as the book. We can actually agree on that now, more or less. So, to me, that means there's honestly no point. To you, it doesn't, because you're content with Watchmen just having a "great" movie on its own merit, I'm not.
Other adaptations are different because other BOOKS are different. For example, whilst books will almost always be superior, great adaptations can happen. Chuck Palahnuik never really said "I'm writing Fight Club so that you can never reproduce it.", Alan Moore has said that.
Although, my main gripe is that if you have to cut so much out of a book for the sake of making it into a two and a half hour movie, for no other reason, then simply don't do it. Fight Club didn't lose much, if anything it ADDED a lot. Hannibal lost entire characters, Watchmen is losing sub-plots and an ending.
Not to mention that it's a comic and along with the story being written a certain way, it was created, visually, to be enjoyed a certain way that won't happen with cinema. I've said all this, though, so I'm treading old ground.
-AC