As others have said thr Forgotten ONe part of LoS was 100% stealth, however it was annoying, but it might be because of the not so stellar platfforming controls. I have faith in this title because it's ambitious (the most ambitious Castlevania ever without a doubt) and they've had a lot of time of polishing, I mean, they game was finished like 3 months ago, all this time is polishing time, it needs to be perfect or as close as it might be on itself. I seriously don't think that with all the time in the world MS had let their magnum opus being drag to the ground by some stupid decisions.
About the stealth, I'm hoping for less MGS stealth and more Batman stealth.