They've played it, you haven't (at least not the full game), so if a lot of them feel that the game doesn't deviate enough from the first game to feel like a full sequel then they are probably in a better position to judge that than you are. Also it's not unheard of at all that the pace and balancing of a game changes over the course of its life, I've experienced it even in the few MP games that I've played, so that's certainly not a point that means this is deserving of being called Splatoon 2.Yeah your probably right my Splatoon fanboy is showing lol.
If you hadn't noticed, this is Forum 2.0