HI Siddharth - thanks very very much for your great compliments about Rise.
We are definitely working on enhancing quizzes with more question types. We already have question randomization and answer shuffling.
We are also working on a feature so you an import Storyline content as a lesson.
We have not made timelines public on these but since Articulate 360 is a subscription, you'll get new features the day we release them.
Auto-play of audio (whether standalone audio or within a video) is banned in mobile browsers. It is not allowed in Mobile Safari or Mobile Chrome. So that's why we have not implemented it. :)