A couple questions or comments:
There's a Sram GXP "team" bottom bracket for around $25 - would like to know if anyone has experience with non-Red sram bb and cranksets - issues with noise, play.
I've already bought the wifli shifters so won't be doing full hydraulic on this build.
The issue I'd raise re: cranks is gearing. 50/34 is steep gearing in larger tire sizes like 700x40...of which you might be limited due to the bulbous ETap FD anyway (it sticks out in all the wrong directions).
Sweet looking build otherwise.