1. You mean add a fire effect on the horses' hooves? That's possible (i think), doesn't hurt to try.
2. The only difference i made from vanilla horse mesh is removing the hair crest from its neck. Otherwise its the same proportions.
3. Yeah, TQ horses look indeed kinda fat lol.
4. I already increased the plumes a bit for the chariot mod, but sure, i can make them even bigger/wider.
Thanks for the feedback!
Edit: On your question about animations - i slightly increased the run animations for the character (17% i think), otherwise animations should be the same speed.