Barring of course, the obvious 'find someone else willing to give away their free time maintaining the site' or 'find an archivist willing to preserve the server data until someone arrives to pull the bato.to from the thinking rock and be crowned king of Manga' which are more wishful thinking than actual development possibilities there is one last feature I would request.
Release a tool or feature that allows users to automatically export their follow list, including alternate titles, author names, series status (complete/ongoing), latest release information (name of the translating group/uploader and title of release)
This could be made easier by having a staggered site shutdown. Images and comments removed first, leaving only the series information to be trawled, severely reducing the server load from such an automated trawling.
Eventually, having such a file in a standardized format might allow for another site to import a follows/read list, even if they do not host the actual series.