In answer to your questions:
1. Vantage does not include social networking login functionality by default, however we do suggest the Social Connect plugin on our
recommended plugins page.
2. The default theme includes the additional search field on the main index, so it would require some customization on your part if you were looking to remove the search for field. There is no setting within the Vantage admin dashboard which will remove it automatically.
3. Not at this time, no.
4. As seen on the
Vantage demo site, you can filter listings using the dropdown option near the top right-hand side of the "Business Listings" section, and this includes "Highest Ratings" and "Most Ratings" options. The "Refine Search" functionality appears on the location search sidebar as seen
here, and there you can adjust the distance for a radius search. These are not specific to users.
5. There is no option to share a review, but like the social login functionality, we suggest the ShareThis plugin also listed on the
recommended plugins page.
6. You as the admin can access the
Vantage admin dashboard, and can view reviews under "Comments", users under "Users". This doesn't show when they last logged in, however you could potentially find a plugin for such a function.
7. WordPress has a built in import/export tool, however this does not specifically include users, so again this could also be something you could find in the form of a plugin.
8. This would require customization of the default theme at this time.
9. The .csv importer is built into the theme, anything else would require customization
10. Vantage changes layout for optimal viewing on any device right down to mobiles, there are no additional settings for the responsive feature. Thanks.