I bought one for my wife last week (I've owned an original since launch), so I wanted to give some perspective from an owner.
If you don't think it's worth upgrading for, or think it's underwhelming, you really need to get one in your hands.
I didn't really want to get one, but now I'm gonna trade mine in and get a StarWars pack when it comes out next month.
Consider the upgrade like the difference between an original GB and a GB Pocket. The size difference isn't as dramatic, but it just feels more refined like the GB Pocket was in comparison to the original GB.