feeling that the map size is as small as AOE3. hope they can expand map size and population limit. (350 ppl will be perfect) not mention to the level of Cossack, at least maintain it at AOE2 level.
As was said a long time ago, the game is designed to support 8 players and around 1600 units on the same map (200 pop per player). The size of the map is your subjective opinion.
This does not mean that you cannot consider increasing the population limit in custom games in the future, not in competitive ones.
Have you played on 4v4? Because trying to get to a teammate to help takes ages and their village can already be rubble by the time you get there.