I can sympathize with not wanting to pay that, especially if you have kids to look after. But on the other hand, if you're in a house with many others there's a lot to be said for having off screen play too, both for you and the kids. It's so damn useful I'd frankly rather have any of these games on the U than my PS3. At no point during Arkham City have I felt short changed for paying full price.
Absolutely. I love the fact that I can just pick up the Gamepad and dabble in a little Mario, even if I'm not a huge fan of it.
Now if the Wii mode wasn't this separate walled off portion and could be played on the Gamepad I'd probably use it a lot more.