I dunno when you added this, but now that school is out, Im finally getting a chance to dig into the Big Bang stuff Ive been buying the past few months (currently have the entire library). I remember looking at this before you had timestretching as a thing in Synchron and it looks like it was silently added to the Big Bang libraries (it was announced for Synchron, but not mentioned for Big Bang).
This makes the usability of the library so much easier, just set my tempo in the DAW and let Synchron player figure it out for me. It also make the library so much more flexible as I dont write in 120, 130, or 140 BPM, typically, I write at 75-85% of this tempo and use half time if I need faster than that.
While I cant stand the Synchron player UI, it certainly has come a long way since it was first put out, and its getting pretty close to being on par with Instruments Pro feature wise (and in other ways, far surpasses VIP). Now if I could only figure a way to set libraries to disable all reverb and to have all mics disabled except the close mics, both by default :)