New info on the name "Performante", why they chose it over "Superleggera", and the aero, from lambo talk this time: 

Name: To make it "short", there is a company called "Carrozzeria Touring Superleggera srl" in Milano. The original company "Carrozzeria Touring" was founded in 1928. All about them can be read in wikipedia.

In 2008 they started many files against companies in the automotive industry who used the name "Superleggera", of course Lamborghini was one of them. I just found them today (in German) and it was only one of the investors who started them. This year Lambo (or it's mother Audi) decided not to go further and will not use Superleggera anymore. I could not find anything if they have to pay back for using Superleggeraon the Gallardo. 

The lawyers from Labo/Audi then immediately trademarked "Performante" what has already been posted here. If they also trademark "Edizione Technica" is not yet clear. So the next version will for sure be called Performante regardless if it is a Coupé or Spyder.

Features:
Many pictures are around and the latest ones show some additional openings and different angles of the new wing. Behind this is the new active system that changes the angle to have less drag on high speeds but best possible downforce in turns. The system also includes variable active openings in the front. It seems that all this works very well on the Huracan Performante what resulted in very low lap times on the Ring. But they keep the secret well.

Together with 640PS, more lightweight exhaust, many CF parts the Performante seems to become an expensive animal