Yes sure, that code will include on next theme update.
About having a different sidebar on each author page, unfortunately at this moment, we don’t have that kind of problem. But i think you can achieve that with using Visibility widget option from JetPack. First, you need to create a new specify widget area for the author page. Then you can add multiple social counter widget items into the new widget area for the author and you can set the Visibility widget option on each social counter widget item to match with certain author page.