So why build a robotic Crescent Rose?
Simple, I fell in love with RWBY's many weapon designs. So far, I have not seen such unique weapon concepts in any other anime that I have seen. Many of the weapons in the animes I've seen have been mostly pretty looking, and are usually physics-breaking if they move. Trying to integrate realistic movements would only change the original appearance too much. Granted, RWBY weapons also fall under this sometimes (Ember Celica wtf) but some of their movements are very possible to do with our current technologies without warping the original appearance of the weapon too much.
I choose Crescent Rose as I have