Have you looked at my proposal? It aimed to remove the burden of Tribal Marketplace (this match is living proof of the burden), while being simple, tweakable, and expandable (can be used for future civs).
It’s not the most elegant, nor is it as radical as some forum posters want. But being practical is exactly the goal.
https://forums.ageofempires.com/t/please-fix-the-fur-trade-mechanic/182290/78