It took 3 years for Juve to go from plans to opening. I think the first somewhat detailed plans for Roma started appearing summer 2014. As of now, they are still reviewing infrastructure issues including potential flooding from the Tiber.
I think Elia is kind of fragile emotionally. He obviously has talent, he just has to feel appreciated and play in a system that suits him. Koeman mentioned after the game that Elia should fit right in to Southampton's style of play.
Adama and Rafinha were a class above everybody else. Halilovic seems so small but he made a good move and got off a nice shot that hit the post. Some thug defender isn't going to appreciate getting faked off his feet and is liable to take the kid to the cleaners.