Hey there,
First post for me on this forums.
What I immediately noticed is that the different units are hard to visualize (maybe it is done on purpose), but from a user friendliness point of view, I think it could help, especially new players to see and understand more, what is going on on the screen. It would also give more value to the different unit types. When you look at AoE 2 (not to mention other RTS games like Starcraft, Warcraft, etc.), you see very clearly what is which unit, which is also due to the 2D graphics.
Another point I like to make is the player coulours are hard to see on units, which is also not very good to visualize what is happening.
Kind Regards,
Ben