Survey is here, if you're interested.
I love this stuff...
Spire Patrol: I found the art on this marginal. Too busy, with not nearly enough contrast between the flying mechanism and the weapon. Ugh. But for play value, I rated it fair. I'd play it in Draft or Sealed for sure.
Ridgescale Tusker: Once again, the overwhelming greenness of art on a green card. But I like the pose and the name is solid. However, a 5/5 for five mana that boosts every creature you have? That's an excellent card.
Take Into Custody: I rated everything about this card as Good. The art isn't overwhelmingly blue, the name and flavor text work nicely, and the ability is a really solid one because it's an instant. It's got some nice strategic value.
Aethertide Whale: Once again, the overwhelming blueness of art on a blue card. I guess that can't be helped, given the subject and at least the whale is purple but...I don't know. It's trying for some dynamic stuff but looks a little weird, especially that curling eddy in the lower right. I do like the flavor text's addition to the world, and the card itself I'm rating as good. Bouncing for only energy and allowing you to gain as you go seems like something that could be broke in the right circumstances, but at least good in the right deck.
Sly Requisitioner: I really feel like the art conveys the non-chalant manner of the subject, so I dig that and the name as well. I rated the play value as Fair but the overall value as Good, because I think that in the right deck-and it shouldn't be hard to engineer that deck-this card could really be a house.
Shock: Ah, the old classic. Could...someone tell me why the back walls are tinted red? Uh-huh... That said, the subject looks like a sneaky fellow so I'll give it a Fair. Everything else I thought was Good: the flavor text contributes to the overall story and Shock as a value card has proved itself since Tempest.
Hinterland Drake: It's a little weird, looking at a dragon butt, isn't it? No? Just me? OK. In the end, I rated the card Fair: 2/3 fliers don't suck and the drawback isn't a problem. But there are better choices. Limited stuff that I'd play if I had to.
Dawnfeather Eagle: Once again, the overwhelming whiteness of art on a white card. Make up your mind, Wizards, either they sky is blue, or the sky is white. That bird also looks like it's attacking but the hand in the picture looks extended to let the bird rest. Maybe I'm just unfamiliar with avian expressions... I do think the flavor text is Excellent though as well as the play value. Vigilance and +1 can mess up a lot of combat math.
Glint-Sleeve Siphoner: I'm a little lenient on the art, because of the obvious setting of dusk and purple hues. The name is pretty meh though and the card overall I'm just calling Good, because you need to do a lot of work to make it viable.
Defiant Salvager: I like the name and the art and the flavor text, even, although I'm not sure they are harmonious, but the ability is fair at best.
Exquisite Archangel: The art is pretty imposing but the rest of the card is just fair. Seven mana is a LOT, even for a 5/5 flier that has a great ability. It's got its uses but the cost makes it a bit prohibitive.
Welder Automaton: I think this card is pretty good! Not excellent, but the value it provides as a 2 drop both early and late in the game have merit. It's not going to blow the lid off of a format, but it can give you something to do if the board state locks up.
Lightning Runner: I really want to like this card...but I don't. Getting the ability to work (an ability I like!) just costs too much. Marginal.
Greenwheel Liberator: I am rating this a little higher, perhaps, than I ought to because the sum is greater than the parts. The art doesn't really track unless you read the flavor text, for example, but once I did things made sense. However, as card, this puppy is excellent. There are an arbitrarily large number of ways to make this a 4/3 for two mana and that's good stuff.
Ornithoper: another classic, like Shock, that has proven its worth in the right place. And Aether Revolt is a good place for the card. But let's not lie to each other: the card is marginal.