Aurier rocks
Aurier is the best right back once you start the game, other than Davide Santon.
True, Santon's stats do not develop half as much as you might expect if you can cough up the money for him, but he'll keep an average rating atleast among top 3 of your team for sure.
About Aurier though, I've had him on almost every save. In my opinion he is slightly hard to develop. Similar to Muniain, injuries can really hamper development.
Here is Aurier on my Notts County save where he turned rather godlike the same year i was promoted to the PL and a picture where i had him on Sevilla, and he was injured alot, at the same time as i found a regen RB who ended up stealing his place in the first eleven.
Hope you find this helpful. Mainly the thing is, you can't get Santon for under 30 mill BP for atleast 2 seasons, at which point Aurier will start looking good if you've trained him well, and he has stayed away from too many injuries.