Yosemite is so cheap looking with lots of ideas from Microsoft windows and Linux UI designs, that it loosing Apple identity and inovation priority...
Even if it were true, what exactly is your problem with that? Everybody takes ideas from everybody, that's how industry works. Ubuntu Linux had "App Store" (Software Center), system wide on-screen notifications and "toned-down" scroll bars way before OS X Lion, just to mention a few things. Eh... never mind. Back to the topic.