With the mention of modders by Madmole, how about introducing real modding support in A18?
Modding support is what allows games to live and thrive long beyond the gold release. And a game that thrives beyond gold release means continued $ stream for TFP for many years after.
Most of the games coming out these days have modding support. I know TFP have done a lot for modding by putting so many configs in XML's, but would be good to take modding support to the next level. -> Integration with Steam Workshop. -> Normal player in game menu that allows player to select mods from Steam workshop.
Lastly, pipe dream here.. XML is the convoluted yuckity yuck..XML is soo 1990's. Switch to json please. Json > XML is not just my personal opinion either. Only XML lover boys are old farts from the 1990's that refuse to come to modern standards. Probably the same guys that prefer to script in batch and perl.
https://www.w3schools.com/js/js_json_xml.asp