With reasoning ut sound like almost all games games would be like 6-8 with some occasional 5's and 9's. That scale just does't make sense to me. Why shouldn't you be able to use the whole scale?

A 10/10 does not mean perfect or close to perfect. That game doesn't exist. Game development is extremely complex and it is impossible to make a perfect game, especially in a game of this size and this amount of content. 10/10 is for the few best AAA games in every genre. A master price. 1 / 10 is harder to define, but should be reserved for the absolute worst and unplayable games. 5 / 10 should be decent but quite meh.

I haven't got to Act 3 yet, but so far, this is one of my favourite games ever together with Baldur's Gate 1 & 2, Planescape: Torment and Witcher 3. SO it is an easy 10/10 for me so far. It has to be really bad in act 3 to drop down to even a 9. I also think there will be more and more patches that fixes the problems in act 3.