This is going to end up like your comments on Sandro. You are so quick to change your judgements and don't allow for common sense all too often.
It took Lennon close to 9 months after his injury this season to get back to his form. Bale missed ~ 3 months in the middle of the season. He is still showing patches but he won't be back to his best for a while.
Even Luka came back and looked awful after 2 weeks out.
I only ever said Sandro didn't look ready, which he didn't based on the early Bolton game.
Sure, injuries can have their impact but by now, you'd think he's had enough time to recover and yet, he's only looked dangerous at best.
Adding to that, even prior to his injuries, he only ever uses his left foot. I kind of like that Di Maria at Real Madrid, at least he poses a threat on both feet as opposed to Bale, who almost always tries to go down the touchline to try and get a cross in.
It just seems he's becoming easy to defend against. Just clog the space he likes to run into and force him to cut inside on his right.
Personally, I'd rather see him at left-back, with someone like Lennon on the left creating space for him to run into.