@TwilightFaze - I like the idea. If you WERE gonna go with one specific girl all along, you'd need to drop subtle hints throughout the story or it'd feel forced/fake. And, if people picked up on that, they might lose interest knowing how the story would, more or less, eventually end.
Giving each girl a route leaves it to the reader to decide which one is real because the author is giving them that right. Honestly, it's probably the only fair way to end a harem SoL manga because fans are so torn between all the girls and it does seem a bit unfair that only one truly gets the happy ending. In this way, the girl you like gets the happy ending and, leading up to this, the author was free to build up each relationship as though that one were going to be the final route.
I think it's a great idea and I know I wouldn't have thought of it.