Cheers, sir! Yeah, we thought about Steam Workshop about mid-way through the game's content updates. At this point, the easiest thing to do without a lot of modification to the engine would be Steam Workshop for text scripts. Like adding new languages.
However, we are currently getting ready to start work on the sequel; we're actively in the design phase. Putting Steam Workshop as a feature in that would be much easier at the beginning so that people would add items and stuff.