Like everyone else on this thread, I also have been plagued by this issue. Since our company has an Apple small business account, and I rely on my mid-2012 MBPr 15", I'm going to take mine to the Genius Bar tomorrow.
I have gfxCardStatus 2.3. I have been able to use the integrated graphics over the last 45 days without crashing. I do this by forcing it into "integrated only" mode. gfxCardStatus has some sort of bug. The first time you select integrated only, it will switch back to "dynamic switching" mode. The second time, it will stay in "integrated only." When I do this, I have not experienced any crashes, even when waking from sleep. If it is in automatic graphics switching, the discrete graphics will kick in for a few seconds. I think this is where the wake from sleep freezing is occuring.
I am the company COO at my company and use my MBPr for everything. This includes running our SAP systems from inside a Windows VM in Parallels to working with our marketing in Adobe CC (everything from InDesign to basic Photoshop). If I force it into to the GT 650M OR HD4000, it won't freeze. If it does dynamic switching (websites with a lot of Java will often kick in discrete graphics), it will freeze at some point. When running the Adobe applications, I prefer the 650M (for obvious reasons). That's the reason I have this laptop is for the performance and the discrete graphics capability. My Dev account has expired, so I'm not sure if a 10.10.1.1 beta is in the works, but I sure hope that is a fix.
It will be interesting to see what they say tomorrow, considering how others have been treated. We've had a good working relationship with the small business unit and they have been extremely responsive for us. One of our mid-2012 MBPr's had the LG panel (LP154WT1-SJA1) and developed the dreaded screen retention issues. It would "ghost" from less than 30 seconds of a steady image. The Genius Bar replaced it with a Samsung (LSN154YL01-001) panel. It had the dreaded "yellowish" hue to it. They found it unacceptable and gave us a new unit with the factory installed Samsung that was the correct hue.
On the flip side, there is nothing I'm reading that convinces me that this is a physical hardware issue. None of our laptops started having these issues until Yosemite. Now all of them do. I'm hoping a "1.1" version of Yosemite is released soon to address these issues. Most of us purchase or use laptops like this for the high-end capability for working with graphics, video, and marketing! These flawed releases over the past 2 years have been progressively worse. It is very disappointing from the "leader" company that should be "better." On the flip side, our SAP systems do require windows. I run Windows 8.1 natively in BootCamp on my work iMac 27" (4GB graphics and SSD). The SAP system runs on a Windows 2012 with Microsoft SQL server. Every 2nd Tuesday of the month, I dread when their Office 2013 and server patches are released. Seems they goof up 2-3 things to fix 1 other. Same with Exchange Server . . .
With that in mind, I hate to say it, but the alternative is WAY worse than what Apple is doing. I wish there was a good alternative (yeah, I know, Linux, but in the corporate world, that is not very feasible). I hope that Apple will take a step back and get back to what they used to do best (not just better).
1) Get back to providing the absolute best customer service experience for all Apple owners.
2) Get back to releasing the most stable products and systems that we have come to expect from Apple.
For most of us, dropping $2,000+ on a laptop is in fact a LOT of money. The customer support should be on par with the premium product. My first iPhone was the 4 running iOS 4. I remember I loved it because it worked right the first time, every time. The same was even true when I upgraded from an old PowerBook G4 to my personal MBPr 15" mid-2012. It was on Mountain Lion at the time, and it worked 100% all the time. It seems Steve Jobs was a tyrant at times (ok, most of the time), but maybe that's what it takes. Things seem to be too "loose" right now. These flaws used to be considered unacceptable.
Just my 2 cents . . .
Jeff