How about video driver issues on retina macbook pros? I've had more lockups since Fall than I've had in the previous 10 years! And while they're at it, instead of screwing around with goofy emojis, how about fixing the absolutely horrendous calculator app‽ It's really an embarrassment -- the window controls don't even line up and C/AC don't work right!
Agreed. I have had to enable Accessibility / Increase Contrast mode (10.10.2) to keep my rMBP 750M & TB Display bearable from lag issues.