Hi Stefan, thanks happy you gave Tiles of War a try :)
1) True, we have thought of the following solution for this: Optional and customizable win conditions. Right now you win, with 60% of map control. This will be optional/customizable. We might be coming up with more win conditions in the future, that would enable different modes. Stuff like King of the Hill, Protect the King, etc.
2) We want the archers to be strong units that have a close combat weakness. This gives players a bit more incentive to protect them and mix up the strategy a bit. For now, we will keep it this way, but thanks for sharing this possibility with us :)
3) Yeah, the tutorial needs a bit more work. We are currently doing a bit of refactoring, and once we have all pieces in place, the tutorial will get a re-design.
4) That makes sense. We will make the AI pay more attention to avoiding water. :)
Thanks for the feedback, we are always happy to hear your opinions, wishes etc.
If you also have some kind of feature you would really like to see in the game feel free to let us know :D