I've never particularly liked 'ALIEN: Resurrection' but I know people who do. I respect their preference to enjoy that film. It's a good thing they don't have to be treated as 2nd class fans due to a retcon that isn't even needed.
For all its warts and bumps and issues it's still - and always will be - an 'ALIEN' movie. I can say the same thing about 'ALIEN 3', a movie I am definitely a fan of. So, I understand where they're coming from. I don't want to see one of my favorite movies shunted aside on a movie that no one can prove will be better.
Besides, it's all a moot point with the series in Scott's hands now. To all intents and purposes he may consider nothing after 'ALIEN' to be canon. He may yet retcon everything that's outside his view of what this property should consist of. 'ALIENS', 'ALIEN 3' and 'ALIEN: Resurrection' may still yet go.
Don't say it can't happen. Scott really doesn't care about much beyond 'ALIEN'.
-Windebieste.