Regarding SW vs AG, I like both, but I think at this point, it comes down to the music, and not who is just singing it. By this point in the band's lifetime, I will expect the amount of Aviv vocal moments to measure 4-to-1 with Steven's vocal moments on any given album, especially given how back-and-forth Steven's involvement has been since the 3rd album.
At any rate, I did pre-order the album from Burning Shed, so I am pretty anxious to hear how the rest of the album sounds. Given their history, I don't expect every song to sound like the new single, and would be pretty disappointed if it became a bunch of Coldplay-knock-offs. One or two is fine, but I hope there a lot of that trademark Blackfield variety across the whole album.
-Marc.