It works both ways though. While people will judge it harshly for not being the FF game they envisioned, if it hadn't have been an FF game, a lot of people may not have even given it the light of day. A good example being The Last Remnant, which many considered to be decent, but as it was a random new JRPG IP from Square, no one cared.Expanding a bit on the title discussion... It really is a shame that people judge the game so harshly because it has a legacy to live up to and nothing more (pretty much everyone that criticize the game do so by making references to the past).
You would imagine that a series that reinvents itself in each new entry, not only characters/plot wise but more importantly gameplay wise (see how the game improved, changed and added so many new things only in the XIII games) would have no need to be treated like that.
As others have said it would be extremely interesting to see how this game did if it wasn't called FF. It would probably be considered a sleeper hit or something. I mean most people never questioned Nier lackluster gameplay mechanics and pacing. Neither did they mention Slow Motion Souls series for being extremely safe in every new entry and repeating big part of its boring and repetitive gameplay choices. But of course, in that case its a matter of consistency.