Personally I think they're sick. My favourite is definitely Edge, with Tubes a close second. What about you all?
Edge is also my favorite by far, whereas Backflip definitely needs some adjustments to make the map more consistent. The start is insanely fun though. Tempest is also pretty neat. No strong feelings on the rest so far.
It's a bit sad that these won't be available in ranked. With a few more adjustments than usual, the 'E' versions would've been lots of fun to play competitively.