It's supposed to be a challenge to find space for all the buildings you need, even to the extent where it's actually impossible, and you have to prioritize between needs. Without this, I definitely would find the game less interesting. The limitation on space is the type of balancing issue that will be based on analysis of game play statistics. The game may not become to easy for you, but it will become too easy for too many.
As I wrote, there are ways of maintaining the balance. If you find a really good way, you can relaunch your suggestion. Suggestion that make the game easier will tend to be ignored, unless they're combined with suggestions on how to restore the balance. Simply arguing that "the game will still be difficult enough, anyway" will get you nowhere. Inno has put a lot of work into getting the game precisely this difficult, and aren't about to change it on a whim.