The non-deluxe version has already been mentioned here: http://playthisthing.com/embric-wulfhammers-castle-0 (which is how I discovered it!). The Deluxe version has been very recently green-lighted by the author.
A few endings have been added (including a new "true final ending") as well as additional quests / story branches. Many scenes are now also fan-illustrated (varying quality but mostly good for such a niche indie game). It also includes various bug & typo fixes (quite the undertaking for such a huge game).
As a reminder, it is a mix of an adventure game, visual novel and dating sim made in RPG Maker 2003. Looks like a JRPG, plays (almost) nothing like one. It focuses heavily on characters and exploration, as well as heavy, but not overwhelming, lesbian undertones. It is more erotica than porn.