New Skaven

So, there was a new release of Skaven in November from what I'm hearing, and was wondering what others think of them so far. I haven't been able to see the changes (other than online pics of some new models, sweetness!) and was wondering what was changed/added/removed.

Also wondering if any of it has affected their usual strategies and such, and I heard rumors of the warp lighting spell being changed.

So, with that, what's the skinny on the skaven?