First off, while Nani's cleat hit Albeola chest high, his eyes were squarely on the ball. In fact, Albeola ran up on to play the ball from Nani's blindside, so he couldn't have seen him. At least from the intent standpoint, you cannot take there was any. He wasn't even looking to strike the ball, but instead to bring it down.
It could've certainly warranted a yellow card, which wouldn't have affected the outcome of the game. From that point on, it was a completely different match (understandably so being a man down).
There were so many handballs and fouls by Ramos, at least a couple inside the box, not once blown by the referee.
Kaka and Modric really did provide a spark. But Man U was the better side up until the booking.