Long-time fan here. I thought I would chime in too. I believe your games are fantastic from a system based perspective. The emergent world's that develop in your games are unlike any other game that I can think of outside of ASCII character based games like Dwarf Fortress or Ultima Ratio Regum. I think that your work is pushed lot of boundaries that I think are innovative.
That said, I think I agree with some of the other commenters that considering switching engines at some point would be a good idea. I believe you've done a lot to push the gaming systems that you use, and now it is time to think about how to ensure that your Graphics can keep up with your vision.