So the OP owned a house but didn’t step into it once in 45 days despite logging in every day, and is now mad that he lost the house?
You could have done things like retainers/orchestrions/armoire at your personal house instead of your FC house, OP. That is also an option. Despite my dissatisfactions with the housing system, I’m hard pressed to really feel sympathy for you.
Not sure if anyone clarified this (I haven’t finished reading through the entire thread), but Crystal Tools was used only for 1.0 (which is another reason why it had so many problems). Crystal Tools apparently worked really well for XIII despite it being a bit dated for it, but it did not translate well into an MMO environment since it was made for single-player console games.
FFXIV now uses the Luminous Engine for its coding. That said, there are remnants of 1.0 coding still around (according to the developers) that may make Housing harder to code if there’s a lot of spaghetti floating around in its coding, but they no longer use Crystal Tools as the main engine.