Ok, I took some time and re-tested the map. I tried the test version and some things I noticed:
1) The multiboard doesn't show the hero icons properly.
2) Some of the heroes are out of stock; are they supposed to be work-in-progress? If so, I'd love to try some of them

3) The Doomguard dude's second skill is bugged. It only does 2 damage per second, from what I see. Is it supposed to deal 20 damage?
4) The damage text can get rather distracting when there are too much of it. I think it can be slightly smaller.
5) The vampire hero has many imported icons. 2 of which I find are rather unnecessary. I personally find the default icons good enough, but its up to you if you want to keep them

6) Most abilities have a level skip requirement of 5. I found it rather irritating but its ok, just somewhat sad that you have to use a skill of the same strength for about 10-15 minutes of the game.
I'll test the vampire hero (haven't tried his ultimate) and feedback.
EDIT: The vampire hero's Ultimate has some small things you could improve on:
Change the name and possibly the icon of Critical Strike to Killing Strike. I remember it being typed wrongly or something.
Metamorphosis buff should be replaced with a custom one named True Form.
Also, he could use some dark effects when he is in True Form, it would look nice

Otherwise, the Vampire is pretty fine. However, the lack of unique abilities is kinda disappointing. You could make Carrion Swarm cooler or something, add extra effect like healing the hero per unit hit or something.
Anyway, I hope you continue working on the map. I was rather busy the last few weeks preparing for my exam and working on my map and was unable to respond.