As of the last two years, the most notable "new" contribution to the English translation of Rawdat al Muhibbin has been the work by (not to be confused with his Quran translation) and teams at The Islamic Texts Society . However, due to copyright, free PDFs of these new editions are rare.
While the full unabridged work is primarily available in Arabic, several abridged English translations and overviews are accessible online for those seeking a "new" or digital copy. Rawdatul-Muhibbin wa Nuzhatul-Mushtaaqeen - Ibn Qayyim rawdat al muhibbin english pdf new