I can't see how draw 4-5 cards randomly alternated in only 2 kind of terrain can be succesfully managed by an expert player... only lucky.
That case is not sufficiently rare.... Yes, for all the players is the same but a game haven't to be balaced in the hoodoo but in the gameplay.
I see very well a 2nd kind of terrain... maybe not for 2 settlers, but certainly for 1. (for me, obviously)
Thank You for your opinion.
There is a manageable amount of luck. Getting appropriate bonus tiles and using them well lets you work with the cards you draw. I will beat someone who only plays occasionally and someone who plays a lot will beat me. Basically a good player will almost always beat an average player and so to me that means there isn't as much luck as perceived.
Rather than try and change rules why not just play another game you prefer?