Hey! I don't know how hard it is to implement, but would be really cool to have the option to get liquid as output so it can interact better with other mods

The idea is really cool in principle, but generally it is very out of scope with Alloy Forgery. For this in particular there are already alternatives available, like Tinkers Construct 3 (Forge) or Hephaestus (Fabric). If we wanted to make this it would serve as an addon, as it would generally require a lot more multiblock modularity to be useful.