Parts. Those new ski pieces should be interesting. Three taps are also nice, along with a printed 2x2 no stud Slope piece. Two 1x2 Mod. Plates w/Horizontal Clip always come in handy. I'm not sure about the propellor though. There is a fair amount of Orange in this set, which I always like.
Is it below, at, or above the golden ratio? Below. (+5) (The Golden Ratio is $0.10 per part.)
If you can't build a frame right away, or choose not to, does it have parts you should be able to put into use right away? Yes. (+5)
Does it have more than a handful of immediately useful parts? No. (-5)
Score: A- (+10). I like this set. I think if you combine it with one of the Series 2 Orange Mixels you could have the basis for a really good frame.