Your Q/A plugin does not generate title and h1 for categories and tags and so many other things are

May be that's why your not using categories and tags there!!! ,when your navigating through tags and cats this plugin gives a damn about any titles or H1 tag for the page or description , it could be way better regarding to SEO, it can actually damage SEO functionalities.

list of some other problems;

1-needs so much customization in terms of css
2-no queries provided to list users by their most voted question
3-no queries provides to list users by reputation
4-no template provided to list users
5-text area is totally out of control , it may change it's size from template to template