The Good: Exceptional visuals; seriously, the lighting in parts of the mines, especially on an OLED w/ HDR is just unbelievable - they pushed the limit of this generations computing power and did a brilliant job. Loved the combat overall, camera aside (only a slight annoyance to me), thought the rune system was really good, enjoyed Atreus' combat, loved the Axe (by the end enjoyed it more than the blades) etc. The story was great for what it was (I'll get into that in "the ugly"), the world was expertly crafted and the flow of the game was very good. Side quests happen fairly naturally and were enjoyable.
The Ugly: Short, and unfulfilling. The game, the narrative the world all felt short. As if some things hit the cutting room floor and they re-wove the story together (they did a great job if that IS the case). I was so pumped when you first get to the realm hopping room to see all the different realms available. By the end, only 2 have any meaningful exploration to them outside of Midgard, another 2 are training excercises, and the last is a cutscene basically. Felt like there should have been more here. The bosses: the first Stranger fight was fucking amazing, and I thought "holy shit, if the rest of the boss fights are like this we're in for something special". We weren't. That was by far the best fight of the game. In fact, we only fought 3 unique bosses the whole game - Baldr, Dragon, Brothers and a fuck load of trolls and valkyries. After GOW3, this was a massive disappointment to me. I get they were trying a new approach, and it largely worked, but they could have replaced half the trolls with unique mini bosses/demi gods. Saving all this mythology is strange to me and by the last troll I was just rolling my fucking eyes.
Verdict: This was a great game, but well short of being a masterpiece - they were so close too; the world, the interactions, the story etc were so well done, but the game was let down by what I believe were time constraints put on the team. Needed more bosses, and about 5 more hours of content to really put it over the top for me.