If I was to make a Kingdoms version of this mod what features would people like in it?

Currently I'm thinking of doing the following:

1) Replacing ballistas with Mangonels and adding Byzantine Flamethrowers.
2) Using slightly different battle models for European Faction Leaders and Heirs (at present all generals wear crowns but I want to make it so that only the regular generals are crownless). I don't have any plans to change the non-european ones because I don't have any new battle models for them.