Nah I don't think it was a waste. More variety in products and price points means a greater possibility of gaining new customers. The N3DS is a nice upgrade to those who already own the older model as well as being a great system for new users. The 2DS is a great option for those with a smaller budget.
And about the exclusive games, I don't believe Nintendo ever fully intended in making a multitude of them for the N3DS. It would've just caused more headaches than it would've been worth. So ultimately I think these revisions were merely to boost sales (as well as excitement) by incentivizing existing users to upgrade to the N3DS and gaining new customers through the lower priced 2DS.
What do you mean from the bit about "more rushed jobs" though?
