I have the theory that the newest books, mainly the advance rule books, are a test for 6E. Looking at BtB with this in mind I think Greyware is probably the future of Cyberware. Like the different types of spirits and more restrictive traditions in FA or having different types of hosts (with a more host based matrix in the works according to the metaplot) greyware seems to be a throwback to the "good old times" of cyberpunk. Not only is it stronger (basically beta quality for alpha cost), it is always obvious, not wireless and does not play well at all with awakened characters. That is exactly the combination I think they will be going with SR6. Back to the roots.
Another thing which might be a test for SR6 imo is the Pretoria SIN system. It is certainly more oppressive than the current system and you can't simply buy a rating 6 SIN and be golden. But I dont know if that kind of SIN management will be accepted at the table in the end or glossed over. Would be nice if someone who does a Pretoria campaign would post his experiences.
To give an example for those whi do not have the book yet, the districts are grouped into 3 classes. Rich, middle class and poor. In which class of district you live and work is encoded into the SIN.
Going into a district which is rated too high for you is reason enough for the police to intervene and to ask you (once) to leave except when it is a shopping district which are a bit more lenient with who can come.
If you go slumming instead its ok for the police, but criminals there will be very interested in you.
Additionally you have the usual nationality, down to which megacorp you are a citizen off and, if applicable, tribal affiliation. All those informations are color coded and must be displayed all times as ARO.
When buying a fake SIN all those things have to be specified and modify the price.
So a rating 6 middle class Xhosa national who works in a upper class district and a rating 6 Evo tourist with no tribal affiliation cost differently and also lets you do very different things.