is there any issue with that widget ? I did not understood your question 🙂

Here is link to atricle which describe how to disable user profile: http://anspress.io/how-to-disable-anspress-user-profile/ I have used AnswerBox screenshot in my site, only front page and user page is different. Even this site uses default AnsPress theme without any customizations.

No you cant, but this may be added in near future.

Add subscribe widget to AP Tag page and thats all.

In that theme I just provided styles for Q&A and Buddypress. If you want you can style blog posts.

Please update category and tags extensions

Widget already exists, AP Users widget. You can show a list of users sorting by reputation.