I believe that traps should be introduced to the game such as land mines and sea mines. These traps could take the place of sniper towers. However there is also the option of using an infantry division or another type of troop to lay land mines where they stand. And for sea mines a destroyer could lay them down. There would also need to be a maximum amount of mines that could be set up.
I believe this idea would make the game considerably better. Thank you for your time and I hope you will take this into consideration.