In my mind no. You're right that it might be little bit duller that way but it is still different enough to warrant that card to be in the game.
However, the last change made to the game was how the end game cards were played. Until that change I championed that at the start of game each player would be dealt 2 cards and keep 1. That way each player has a different needs at the start of game. This variant is still possible with 2,3 and 4 players.
If you play like this only one player has the freedom for the lakes and is interesting. Warning though, scores will swing a lot more playing like that.
If you used that variant would each player reveal their scoring card before play began or wait until scoring the game at the end?
Brilliant game btw!