I gather when you say Summer or end of FY2015 that is April- sept 2015 .
That is really bleak prediction. I hope the dates become current before that even if CO wants to retrogress them again. Most of us would be happy with EAD/AP status for 2 years rather than getting a GC in quick 4 months after 2 years.
I dont see why they can't just get all the applications in and take their own sweet time adjudicating the GC applications
Regards