Thank you for your compliment!
To idea 1: the campaign is already finished, BUT I will add bridges, houses and other structures to the gamemode you suggested.
I think it would be cool to have some different and interesting maps. I don't know if I want to add water, but other structures will be placeable. At the moment, trees are only in the custom battle editor and they are using a seed like the rocks and the grass.
To idea 2: I already thought about to bring this game to mobile platforms, but it's nearly impossible in terms of performance.
But a 2D version would be quite cool. This is something I would do after the full release of the main game.
To idea 3: A bird view/map would be really easy to code :) I will think about it.
To idea 4: I'm not sure wether I understand you correctly, I'm using the default unity physically based shader and a few custom ones.
I think you want some image effects. This will be the last thing I want to add. I'm not 100% sure if they would fit into the game, but I could at least give the option to enable them.
To the end :D: Thank you! To be honest, as I finished Ancient Warfare 1, I was really unhappy with the result and I thought nobody would play it. But to my surprise it was successful and it has 10000 downloads until now. And I knew I could improve nearly everything. And I started to develop Ancient Warfare 2 and I think I will not regret it :)
Again thank you very much for your great feedback, ideas and inspiration.
You pushed my development these days!
Btw, I changed the units to only cause damage while they are attacking and the wood parts of spears won't cause damage furthermore.
And the first towers are in game. If you have twitter you can follow the development there: https://twitter.com/jannik_jn
Anyways feel free to contact me again or ask if something is still unclear.