This is not unexpected news. We've known that the level cap was 10 for many months. It's not secret information. Where did you get the hallucination that you were going to be able to reach level 15-20 in this game?
If you can reach level 4 of a total level 10 game, that seems substantial. This is consistent with how Larian has done Early Access for their last three games: They give you a small portion of the game to help refine the game's systems. Even if they did give the full game, what percentage of players would be able to complete it before the next version comes out forcing them to start all over? Only the most obsessive ones, which won't lead to balanced feedback for less dedicated players.
