Expanding Features Wishlist

What are some things you'd like to see the devs officially expand in AOE2 DE? My biggest wants have to do with immersion and enabling mod-ability.

1. Enable unique unit and building sets for each civ so that modders can make distinct architecture and skins for all 35 civs, like the Unique Buildings mod but totally complete.
2. Likewise, have distinct voices/languages for each civ (so Italians can speak Italian/Latin while the Byzantines speak greek)
3. Give more latitude to packaging mods so we don't have to choose between Data sets to enjoy different gfx mods.
4. Enhance the UI more for replays and spectating. Specifically I would love to have an option to display the seed # of a RMS map in a replay so I can play that exact map again if I want to later.
5. Some kind of "Build-an-AI" so players can build their perfect AI for singleplayer/multiplayer/scenarios.
6. More Art of War! I really suck at it but it makes me feel accomplished even with all bronze/no medals.

Sorry if some of these are already covered by mods already, but I think any official attention from the devs would be even better!

What do you guys want to see? Would love to hear your ideas.