Not sure what I'd think about a review that wasn't based upon the actual gold release. Seeing as how we essentially have an online only game and that servers for said game aren't active with XBL users, I'm not sure what the point of a full review would be.
Based on the beta? Based upon what one thinks the gold release will be like?
Titanfall is such major/important release that an embargo resulting from a thinly veiled attempt to hide a poor or broken game would be completely ineffective. I think the simple truth is the game simply isn't active and running so there's nothing to review yet.
Plus the vast majority of previews out there from reliable (non-biased) sources have been nothing but positive.