It was time this version of the module got its final release. We are still fixing bugs if we find them but functionality wise nothing will change.
Last two changes that went in:
Issue #1879762 by Nick_vh: Adding multiterm support for solr 3.6+ and solr 4.5+. This will help with allowing wildcard searches be more accurate
Issue #2375331 by mkalkbrenner: search result theme suggestions broken