Listened to 3 tracks so far. I like the way C'mon C'mon has that Chinn-Chapman, Sweet/Suzi Quatro feel about it. It would be nice to see that kind of true pop-rock sound make a comeback.
The problem I have with Def Leppard is that they don't really seem to have an identity any more. They had that signature Pyromania/Hysteria/Adrenalize sound and it started getting dated, so they moved away from it - fair enough, but they've been a bit directionless since.
Then again, I still think High 'n' Dry was far and away their finest moment, so what do I know?