My simplest response to both questions is: enigmatic uncertainty. Boris Johnson has shown he has the stomach for a fight - the cleanout of 15 members from the Cabinet; brave appointments including hardliner Priti Patel and Sajid Javid show resolve, and will, to provide financial muscle to the cause and to the economy. So as PM, Boris wants to show he means business.
On Brexit itself, Europe and Britain are in a quandary. Certainly from a manufacturing (and business) repercussions perspective, talk of a no-deal departure is already having impact. Vauxhall Motors owners, Groupe PSA, have warned of transfer out of Ellesmere to name but one instance, since seamless trade, sourcing and export of goods (and services) has become an issue. Coupled with stockpiling and inventory runups, it all makes for unhappy reading.
I don't expect chaos, since I believe Boris will push the boundaries to the maximum, then negotiate down as he is far too canny for chaos (and its effects). But I do believe that there is no phlegmatic British approach presently, as depicted by the British pound hitting new lows against the Singapore dollar last week.
The silver lining is - October is close. We will know, or find out, very soon.