As far as I know, the only reviewer that most of us had contact was the spanish guy, I don't remember his name. He said the game was ok. I think that the problem here is that LOS2 is overly criticized because they keep comparing it to other games and older Castlevania games. The stealth parts in the game, I think that were just to fill story gaps. Dracul begins weak and fire arms will kill him, so he's gotta hide. When he grows on power, stealth will no longer be necessary. I think that stealth bits were designed just as a little plus on the gameplay, this is not Batman: Arkham City. Apart from that, the gameplay, combat seems solid, the music IMO is great. We just have to wait to play the game for ourselves. I am almost 30 years old and I had my share of played games. One thing that I am sure of is that if you like the game, that game can be the best game of all universe, even if others say it's shit, or you just won't like it. Just play the game and make your own judgement.
LOS brought back Castlevania to a wider audience. Not just the same fanbase IGA built (which is a good thing). I do hope that LOS catalyzes a more deep approach to a Castlevania story, a new story.