I'd love to hear natural instruments, especially (because they are more isolated) on the intro. But I know that's easier said than done.
"margaritas keep the spirit high" ... hahaha.
The drop-out at about 1:22 is great. Overall I like the stop-start nature of the arrangement, lots of sharp turns. The only thing I think doesn't fit among all the elements are the "ditdit dit dit dit" bg vox around 2:50 or so. Their rhythm just struck me as odd. Funny because I liked the addition of the drums rhythm behind them as that bit goes on.
The part at 3:19 or so is great. The little hiccups in rhythm there are awesome. Again, I wish for real instruments.
You've rapidly become my favorite vocal arranger on the board (with all due respect to the rest of you). Love the vocals, too, especially your full-voice leads. All backgrounds. Less so the falsetto leads, which sometimes have a different timbre, it seems, than the bg falsettos (though that could be due to pronouncing words or jumping in and out of falsetto).
Overall, cool stuff (again). But where the hell did you get the idea we're nice around here? You might want to go read some reactions to my posts before you spout that...