Certain settings for new quizzes are controlled from the assignment settings screen. This includes the due date and availability dates, and point value of the overall quiz. It is understandably difficult to transfer some of these functions to the New Quiz directly, but it should not be so hard to find these settings. Right now the only way I have found to access these settings is by selecting edit from the three dot menu next to the quiz on the assignment tab, and only on the assignment tab. On the assignment tab this first produces a pop-up with only total points and due date for everyone. The rest of the settings only open after clicking more options.
These are not options that should be hidden from most teachers. These are commonly used functions when due dates need to change due to unexpected circumstances for the entire school or for a single student. They are also relevant when a mistake was made setting the point value of the quiz to begin with.
Therefore, the edit assignment settings function should be available from every three dot menu connected to a new quiz (or any LTI that shares this issue). This should include the three dot menus in quizzes, grades, and modules. (If it also shows up for regular assignments in modules and grades there is no harm done.)