Testing against an AI now, but judging by the description I'm not sure what to expect.
Just got finished playing:
Terrain: 7/10
To be honest, pretty much the entire map is flat besides the middle river - the edges of the map look like you made terrain out there too, but you set the Camera view further in than the Map boundaries, (it looks that way with the waterfall too, I could see a large part of it outside the map bounds)
Doodad/Environment: 8/10
Doodads placed well but not very many, leaving other areas of the map just bland pieces of hill-less terrain with only trees.
Creeps/Neutral Passive Buildings: 3/10
The creeps on each side of the map need to be symmetrical if you want it to be a melee map. Also, the neutral buildings should be the same areas on both sides ie. how on the right side its harder to get to the tavern than on the left side. Also the creep levels are very erratic, I started on the left base and right next to me there was a level 9 Stormreaver warlock? :/
Originality: 6/10
What can I say, a new map conception but however the "two bases with a river / gorge right down the middle" is a bit overdone in both blizzard and player made maps
Playability: 9/10
Its still a good map, just needs a few fixes. I could see myself playing it again.
Overall: 33/50
Not bad for a melee map but it could use some polishing. Voted for approval.