The "lagginess" is likely due to spotlight indexing, which will take a while. The "pinkness" you see is due to Apple changing the display's white point. I believe they changed the gamma from 2.2 to 1.8, where it used to be prior to Snow Leopard. You can always change the gamma back to 2.2 (6500K white point) if you wish.Why does anyone always say that lol no i want a macbook and my 2015 was great im unhappy with new one but what return it and buy 2015 again i will loose money i expect a £3000 to be massive improvement