The race for "thinner" and "higher resolution" is killing Apple's computers IMO. The point will be here soon where I have this thin piece of crap that can drive a 5k display with, but can't do much else due to the crippling of hardware/software and the lack of any usefulness.
I've said this before, and I'll say it again. When I get a new iPhone, the first thing I did was put all Apple's apps in one folder and put them on page two. I then went and downloaded third party apps that were better and did what those Apple apps should have done.
Now, when I install Yosemite, I do the same thing. I don't use any Apple apps any longer, except really Aperture. Yosemite has to be the worse OS X version I've ever used. All I do all day it seems is force quit apps, and that's after a clean install.