Several if not all of these have been addressed in popular mods but I'd like to see the following Enhancements:
1) Camera Spin upon Death and Respawn: Default to OFF. Just maintain Manual Camera Orientation.
2) Camera Quick Orientations: Quick N,E,S,W snap to Orientations plus "Home" which resets Orientation, Zoom, and Pitch to default, focused on player
3) Camera Follow/Track Player: Toggleable
4) Camera Pitch: Currently Rotate and Zoom are the only manual camera controls, please add Pitch
5) Game Speed/Clock adjustment: Faster/Slower. Single Player in-game (already available in some mods) and Multiplayer pre-game.
6) Tech Tree Pre-Selection/Planning: Permit preselection of Tech Tree Paths so that skills/abilities are applied instantly upon Level Up
7) Favor Items: Prematch Selection Singleplayer AND Multiplayer
8) Favor Items: Need rebalancing. Amulet of Transportation by far the most valuable.
9) Transportation: Maybe Transportation should be a universal mana skill? Match level setting.
10) Tournament - Make AI Players definable in Single-Player tourneys. Currently just rando.
11) Tournament - Make quantity of players definable in Single-Player tourneys. Currently fixed at 8.
12) Stats-Stats-Stats!: Make all sorts of stats viewable in-game (as a togglable option). Teammate Health/Mana/Lvl/equipment/etc. Citadel Lvl and Upgrades. Tower Upgrades (health/s, damage). Player heath/s, mana/s, damage, armor, speed, attack speed, dodge%, etc.
13) Attacking/Destroying Towers/Fortresses should have Exp earn.
14) Fortesses should drop a Vial or Scroll upon destruction.
15) Assists should be more liberal, as in I was within a particular radius for a particular duration.
16) Graphics, sure, but don't waste too much effort here.
-Auras/Visuals for more duration-based effects, such as drains or temporary boosts, etc
-Would be cool to see equipped items on Demigods.
-More selectable settings in Graphics for tuning GPU load.
17) Multiplayer - More than 2 teams. Even up to 4 teams would be super.
18) More Maps, Bigger Maps
19) 2 or more new Demigods?
BTW, these are not listed in any particular order. Do not assume priority based upon the order, for example. In fact, I'd prioritize whatever is lowest level of effort to accomplish first.