I have an Oct 2013 MPB, 2.6 i7, 16Gb RAM, running Yosemite 10.10, and my PP CC is currently up to date.
The new features are very nice, I particularly like the masking features. They are great!
However, I don't know what else to say other than it crashes constantly. After I render, after I save, when I move a colour wheel slider in Colorista ii. So many crashes. TOO many crashes to justify using the software for professional jobs.
I'm paying to use this software and I have (like all of your customers) deadlines to meet. When you offer software as part of a paid service that just doesn't work practically, then it feels like the customer is being robbed.
SORT IT OUT ADOBE!