There are questions with excellent answers and descriptions marked as Community wiki. The problem I found,
I tried with community wiki subject in search bar, but got directed to answers with Ubuntu-wiki like tags.
One of the best purpose of Community wiki answers I found was, that they address & provide in-Depth solutions to common queries / questions and problems. Which helps a lot to new-Comers like me and amateurs alike. Example questions like
Although the Votes section addresses them but not exclusively for all Wiki questions.
From my side I could suggest this
From the above screenshot, instead of having placed four Meta (I don't know why and what for meta questions are highlighted in Ask Ubuntu page), we can horizontally divide it for the Community Wiki section with community-wiki tags if possible. Which will be showing two questions down below same as Community Bulletin section.
Or in any other way easily accessible.
Another feature I can suggest is scrolling down them to see most active or on Main-page-based question posting idea, within the two question area, similar to Facebook right-side notification scrolling (I hope they don't have a patent for that).
P.S.: By this, I am just suggesting a Community-Wiki based questions format for easy accessibility. I am just trying to post my views for a better Ask Ubuntu through this. In the end, they are just personal view or suggestions.