It will be released within 1 - 1.5 week. It will not require to recreate quizzes again, it will contain a new parameter in quiz settings which you can change for necessary quizzes. One note, create new question category for each bank category because quiz works with question categories, not with bank categories.
If you want to change layout for "Multiple choice" question, it requires to modify a javascript file. "Choice" label can be changed in language settings. You can read how to change message or create a new translation
here.
Regards,
ARI Soft