I 100% disagree with avatar conquest. It is a broken system that only encourages cheating and grinding.
There are many cheats you can do in CheatEngine that removes the grinding advantage and also allows for things like multi clan specialism. S2tw is an very easy game to cheat and unlike the other TWs there's more of an incentive to cheat. Plus it's not really a competitive game due to avatar conquest and a broken classic mode.
For TW it should remain traditional,with factions, unit rosters, etc.
Things that would really make the MP more immersive and fun would be:
40 unit battles (already in) but have it more optimized to work with maps.
Larger maps
The maps having objectives to capture on the field, thus giving incentive to advance and attack or bait opponents through other methods.
No debug camera to limit a player's perspective in game forcing them to be more alert, check minimap, and use tactical overlay.The default camera shouldn't be high too as that defeats the purpose of having a more limited perspective. Plus it's immersive to hear all the little sounds which is one of the points of TW.
List can go on but the above should suffice.