I would be very surprised if the game couldn't be completed in 3 hours or less.
Now me, I played the game my first run in about 70 hours. I read all of the dialogue, run down the quests, read the descriptions of items, etc. So the length of this game is very much dependent on how willing you are to get into the world.
"Another giveaway is the voice-acting. Its all over the place, as if some actors had recorded their lines in time and others were scheduled to but then the game was in post-production. A number of companions, such as Landry, have voice acting in near double the amount of others, and at crucial story moments where others such as Barik or Verse has written dialogue. This seems...incomplete to say the least, simply because it is so inconsistent and again, it says to me that the game shipped a couple of months too early."
I would add to this that Lantry, eg, will have spoken dialogue one sentence, next option is unspoken, then the next is spoken ... 100% I am certain that they just ran out of time and money.