Finished the game, I'd give it an 8. It's perhaps not quite there but I don't think it's as low as a 7 for me either. It took me 21 hours according to Steam (so less with all the loading and leaving the game running after launch to do stuff or whatever) on balanced difficulty with the default combat, not the tweaks the classic mode or whatever added. It's nowhere near Souls difficulty and the combat is fun and combo based like previous games, although I found myself relying on very specific combos rather than experimenting DMC style, but the core feel with the slow motion dodge and counters etc is still solid.
It lacks polish in some aspects like for example with having the Souls style death mechanics it means that you don't reload a save after a boss kills you so you've totally wasted your special gauges if you used them and failed so you either wander around killing mobs to refill them or use your items. It feels off when in other such games you'll reload your save and have your gauges as you did before fighting the boss. I'd just advice to use your items and not give in to hoarding mentality, I hoarded it all and eventually sold it for currency instead of use it and only kept 3 of each just in case but only used any on the pre-final boss so yeah, if you die use your items to refill, I think you'll have enough for the whole game and avoid some frustration that way. Maybe you can even use more mid-fight, I never did outside heals.
Overall I really liked it though, I basically played it nonstop. Later areas were far more complex than earlier, at first I thought the game has next to no puzzles or traversal challenges but towards the end I had to use all the skills acquired along the way to traverse them and overcome obstacles and figure out where to go by scanning the environment for accessible areas and enemies were much tougher as well, my only gripe is the later larger areas brought my framerate down to around 50 very frequently and occasionally down to 40 but they really were huge open spaces with lots of stuff so they were also cool to witness.
Oh, the story also sucked pretty bad but the cut scenes were few so it was minimal and fine most of the time, the ending was definitely underwhelming in the same way just like every cut scene with more talking and when Fury is supposed to totally pummel some enemy old-God-of-War style but her moves and direction are lukewarm and her in-game combat animations actually better most of the time, lol.
I'd be up for more content if they release good DLC and also a potential New Game + addition where you can either sequence break or just keep your levels after you acquire each power/weapon etc. Currently reloading the last save just takes me to the part right before the final boss, though you can still explore the rest of the world and get any secrets and optional content you missed.