I'm not sure where else to find this info but will there be a community mod where one could preview any of these changes for R28 ?

yep, the fact that map size and playable area so strongly affects cavalry balance is good evidence that their speed is too great a share of their balancing. I think it would be good to bring them closer to infantry units and differentiate their roles (as opposed to just being faster, better infantry for the most part). This is made much more difficult by the fact that CS infantry are economic assets while CS cavalry are not, but improvements are still possible.

You forgot to add a well or some central element. I'm looking for references and ideas and doing research. There's always a central object, like a well.   Houses of different sizes. Sheds and warehouses. Pens for goats, sheep and chickens. Orchards and small cultivated fields. Wooden fences and low stone walls. Simple workshops (carpenter, blacksmith, potter). Bonfires, benches, carts and piles of firewood.   A composition needs to be made. 

Hey, @Itms I just submitted my mod to mod.io and was wondering if you could approve it. The mod adds a unique Māori civ to the game. Thanks, Zach

Definitely the fana should not be exclusively a counter-champ cav unit nor be stripped of its cav damage multiplier. Reduction of unit stats will suffice. HP and or a little speed and maybe one more armor value.  Speed nerf for cav would be great. People are trying to play 7v7s right now and its definitely even more clear that the speed of cav could be nerfed substantially and the mobility advantage would still be enough.