Graphics looks really nice. I like cell shading look, but I do understant, that some do not.
Animations are great, last thing which I miss on that is, that trees should a little bit move in a wind.
Other then that very nice.
Also, on that flat terrain note. It was not really that the game world is flat, but more like, that the textures looks flat which is true, not that there are not hills.
One last thing on the graphics, it still seems a little bit sparse or barren. More miscellaneous items, like grass, stones, trees, muschrooms etc... would make look world a little bit more alive, and interesting to look at.
I guess nothing what can not be solved with user made maps, or campaign, but it seems that random generated maps are done this way.
I love all moding tools, and it is really great, that somebody with wild imagination can make so many interesting things with provided assets and tools.
Graphics exceeded my expectations, but I am still a little bit worried about sounds, and their quality and variety.
On fyling units, there will not be flying units which one can train or "build" but there will be some which player can get, from let say, quest, dungeon, etc...
August 24th is still too early to me... lets have a look. We still havent got:
Multiplayer (there can be problems witch connectivity)
3D engine (Again, hardware issues, performance)
Caravans and roads
Whole combat system + (Naval, morale, sieges)
Most of the spells
That is really alot of to do, I am sure, that most of those things are already in your beta build, but still if you want to gather some feedback, and make some changes, you might need more time.
And not only that, there can be loads of problems witch compatibility and hardware issues plus connectivity.
And after all this, you must work on balance, and AI.
It is not unreal, but the question is, if you can do everything right, and polished on time.