The map as a whole looks fair and playable. The distances are okay, some areas are narrow and some are wide. The doodads are distributed evenly, and it has a warcraftish look. This is a solid map.
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The tree lines at the starting positions are highly unequal:
This is definitely a big issue for advanced players.
Generally speaking, the bases are "too deep" inside the forest. It's too easy to close your base with buildings to keep harassing heroes out. Such funnel designs should, if ever, only used with expansion gold mines.
Also, at the top position, you can build behind the gold mine, but that's easily fixed with a tree or two:
EDIT: Potentially not a problem, I may be misinformed
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Personally, I feel that this 'grassy dirt' terrain (I think it's from the Ashenvale tileset) looks weird because it doesn't synergize well with the rest of the terrain:
It looks weird both on the green and the red side of the map. I also think that you could've done with less terrain types overall and it still would have looked good, the many types of floors look chaotic in some places.
I'm not too happy with the many varieties of doodads either, it's not my taste. For example, you wouldn't expect this dude to be just standing there:
It's a statue in the middle of nowhere, with runes and lanterns.
Or consider this next screenshot: The building on the left makes perfect sense. It's placed near a road and there are some crates and hay. But who forgets all their valuable stuff near a random column? Just imagine yourself wandering through the wilderness and suddenly there's lots of carpets literally in a lake. I would have preferred rocks there.
However, I know that this is completely a matter of taste and I'm also nitpicking. All the stuff near the coast looks great, by the way, with the exception of those huge bones, because Blizzard did a poor job with those.
You can blink up the cliff here:
Not a huge issue but seemingly the only spot where it is possible, so I assume that you've only overlooked it.
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There are relatively few critters, particularly in the corners. Ask an UD player whether he agrees with that, I'm not 100% certain. EDIT: Never mind that, there's just none right in front of the expo, which irritated me.
The lvl 9 Murloc camp only drops a lvl 1 permanent. Should be a lvl 2 typically. I recommend to either downgrade the spot to lvl 7 or make it a lvl 2 item.
I feel that there are too few green camps overall.
This camp should be moved a little further back:
Same goes for the four creep camps in the center of the map, they'll attack unsuspecting units.
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To sum it up: I don't think the map has any major flaws, all the points I've mentioned can be fixed within reasonable time.
Large parts of the map look very nice, although there are a few things that I would have done differently.