One of the main reasons why most fans didn't like this it's because this is not a follow up to max and chloe's story which is unfair and yeah the voice acting and dialogue is kinda weak specially the main protagonist (sean) it's not flawless but even so, the story and characters are really good, it's much more longer and bigger than the original life is strange and it's very grounded, this game also started out a lot more emotional than the first episode of season 1 which is fitting since this game is goes for a darker and more miserable story.
One of the main flaws of season 1 was the fact that the final episode was really rushed and disjointed (lis bts suffers even more from this issue) but not this game since it has several endings and surprisingly this is the only lis game that have your choices actually impact the ending you get, that's a huge improvement for the series.
Now of course nothing is perfect and this game has some pacing and story issues, for example i wanted more out of chris (captain spirit) since he had his own little game, another thing is that the cast and the setting constantly change in the game and while that makes things fresh it makes it hard to get into the side characters since they won't stay for long but other than that the relationship between the two brothers is the heart and soul of this game and that never change.
Overall this is a great game that if you go with the right expectations it can bring out a lot of feelings out of you, definitely a lot better than the scores would tell you.
