Well, to be honest this is a not a map most melee players will enjoy playing against other humans.... The downsides are:
-No player interaction possible early on, even in lategame the distances are very long.
-No expansion possibilities.
-Very basic terrain, not polished. The playable terrain extends until the edges of the map.
-Trees far away from main buildings.
-Air units have such a big advantage, I don't see why anyone would bother making ground units after reaching tier 2.
I understand you are new to making melee maps, which I'm happy to see. Unfortunately it isn't as easy as it may appear at first to make a good melee map.
This map would basically need to be remade completely to be anywhere near even the worst blizzard maps. Therefore map set to substandard. Sorry. Try to look at the standard blizzard maps see what they are doing to improve as a mapper.