Why take so long: We are building an fnf engine from basically nothing, because original engine sucks in general. This engine at its current state most likely already beats 99%, if not all other engines in terms of modding. You'll see soon.
Lots of updates, more engine changes. Mostly optimization. Beta release should come around Christmas, before or after. Will include the first 3 songs with half of the planned mechanics, thank you for your patience !