absolutely right that we have to be careful about overuse of quizzes and avoiding the monotony of the same activity (e.g. drag and drop) again and again. Breaking it up with other types of content and interactions can soften this somewhat, so it’s worth considering that when designing them.
And as many of you mentioned, feedback is really important, and giving them the chance to review the quiz afterwards or point them towards areas they need to work on is preferred, though that does require a lot of backend work from the creator. Storyline does allow you to do this, but it is a bit of a learning curve. As with most things, the more learner-focussed and accessible you want to build things, the more time and knowledge will be required to learn the tools/skills to create this.
@caitlin I think being upfront with students about the scores would make the most sense, and would reduce the work on your part. Just make sure in the feedback or results page it is clear what different marks would mean to different students. (e.g. if you require 6.5, this score is good etc).