Although I know many users complained about question groups in Classic Quizzes being confusing and a tedious way to shuffle test questions (Yay! Shuffle questions toggle!), there are also users that loved that feature and miss it in New Quizzes. 

Question groups are still a great way to take a few questions from a larger bank to randomize for a specific topic or content piece as opposed to randomizing all questions on a quiz. A workaround was suggested here but is pretty unrealistic if I have a bank of 50 questions I typically use for a midterm and I now have to split that up into another 15-20 separate item banks to be able to randomize by concept (imagining I have 2-3 questions in the bank that would test knowledge of each tested concept).

The easiest solution is to allow question groups in New Quizzes as well. Although not ideal, it would also work to have a hierarchical filing system for the item banks where I could put those concept banks within a midterm bank. If I had to have 20 banks for the midterm and 40 banks for the final listed individually in ONE class, you can image my item bank would be pretty unusable - and that is only if I taught 1 course in Canvas! What if I teach 5 or 6 different classes in Canvas and each of those classes has 80 item banks?

With the overwhelming prevalence of cheating in online exams throughout the pandemic (and digital exams in general) enabling question groups would go a long way in allowing instructors to fight back by making cheating harder.