Well, 7-8 is what really deserves the game, the first time I played it I put a note 9 (history and those magnificent boss battles makes you forget some things).
I've recently returned to play, with the hype of the story off, i saw the authentic defect, I think a 7-8 (depending on your taste in stealth phases) is the most fair.
As I told the end is regrettable, was not what someone told me long ago, "Dracula kill Alucard, defeated Satan but remained very weak, brotherhood will capture and shatters. Tortured (braveheard type) ". Are they changed? no idea, but even he can be categorized as end (I'm afraid to Konami issued in any meeting that final open ..)
They have not learned much from MoF where they tried to try many things and few worked well for them.
With LOS2 something happened, but in that sense i admire them that are not afraid to try things. Some work some do not. The modern era does not quite fit, Stealh phases enjoy me but for the player of Hack & Slash is a WTF! enormous.
I hope that their next project will be more "typical" programming and simply do that everyone expects the game without departing from the script.
P. D. Rebel Arc Studios, original team that founded later MS had a game called "Blade the edge of darkness" Founder Authentic Style Daemon Souls, few will know. If I were MS rescue and would use that license.
About Sonia: Sonia was seriously contemplated, i would like (do not know) that she included in Victor DLC ..