In hope this gets retweeted/reposted.
Have any idea how to improve Whonix and want to do it?
You could also check the Feature/Bug tracker.
And pick a task which interests you most, or ask for the most important or most suitable one for you.
There are some tasks which require discussion, ideas, thoughts or only documentation, others require research or communication with upstream, some are ready to get implemented and are waiting for code.