1. Pathing blockers are needed to avoid the units getting through houses and doodads.
2. You could add hero glow to the heroes:
How to add Hero Glow without Modeling
3. Spells should have visible hotkeys and proper descriptions (values, levels and such).
4. Spells aren't properly positioned; their locations when you learn them differ from where they are after you choose them.
5. Some icons don't have proper DISBTN as they look like active icons instead of disabled. You can use this program to make DISBTN versions:
Button Manager v1.8.2
6. Bandits appear out of nowhere and they don't constantly attack; they also return whence they came to then come again to attack.
7. Terrain is kind of plain and flat. Little tile and doodad variation.
8. It's annoying that the camera moves after the hero during battle. Makes you dizzy.
9. You can farm bandits indefinitely reaching to higher levels where healing exceeds current HP.
10. Do Health and Mana Stones stack?
11. There are WcIII heroes in the Tavern.
12. How do you get lumber for the ship?
13. You should put some circles of power or something to hint players that some buildings can be entered...
14. Camera in the next town (after you teleport) is annoying because of things getting in the way of the screen/clicking.
15. Items need organized descriptions.
16. Should there be trainable mercenaries in the camp?
17. Skeletons don't give gold like the bandits. Oops, it's not visible.
18. For some reason the sword that also gives agility slow your attack speed.
19. Worgen Blood has an active ability icon and is a passive ability. You can use that program I've mentioned above to turn the icon into passive looking.
20. What is Spirit in this map?
21. Quests should be marked as completed after they are done.
22. You can deal damage to bosses/units and then get out of battle, return and finish them off.
23. Although I appreciate the fact that the gaemplay does not only include kill units on the map while some of them come towards you, the gaemplay is still monotonous.
24. A backpack would help wasting time returning to places where you temporarily leave items.
25. Could stop the rain from time to time. It hurts the eyes.
26. Bosses aren't interesting. They just attack. You can beat them easily because mana is almost infinite and you have healing. The necromancer dude was the toughest because he had stun and feedback.
27. "Two minutes until Odo's raid begins"
I've killed the last boss too before going back with the letter. Why not a countdown timer?
28. After the "timer" ends I've been teleported to Odo along with the other inactive players and nothing else happened.
All in all quite an easy map in singleplayer, heavily unpolished and pretty much unfinished.