For me (and I am only halfway through Act I I suppose), this is way too long for to act as an introduction to the game. I also suppose it is not yet fully finished, although I guess it is only lacking some closure or conclusion to the main quest and and a more precise outlook of what to come.
Now, what do I mean with too long? For me, and in the literary and theatrical sense, the first act of anything introduces the main characters and outlines the plot, basically the exposition plus the core mechanics are explained to you. BG2 is a nice example. You meet your character, get filled in with some background, meet the important NPCs and, most importantly, you meet the antagonist along with some foreshadowing and some hints as to what is up with him. The whole chapter only lasts for two hours, I'd guess, but leaves you satisfied with the conclusion and eager to experience the rest.
As of now I have spent around 20 hours in the game and I do not have the feeling I know anything, or that I am eager to learn more about what is happening. There is no intriguing and charismatic antagonist, but a few small ones that interest me not (the tadpole and Raphael, Gutt and the Drow). I also do not know if the tadpole and it's removal is indeed my main goal, or if it is just a symptom of something bigger going on. I also do not care, really. The tadpole seems a minimal threat, it does not bother me or others, it does not affect me personally or on a global level yet. At the very moment I am feeling just like a guy that is urged by family and friends to go to the doctor to get his moles checked out and subsequently removed, because they can cause melanoma further down the road. Similar urgency.
What I am also missing after so much time in the game is a hub like Athkathla or Baldur's Gate, a base of operations from where I can freely choose what to do next. I am still railoaded onwards for hours, which is fine for a classic act I, but not after 20 hours.
