The map you chose for your mod is totally melee claustrophobic.

It seems players have fixed starting location. That's not good for melee.
Also this map doesn't work for maritime units.

Human:
1. Engineer has the same icon and mode and soundset as the Peasant. Why not use a custom model and icon?
2. The second building replacing the Barracks from the Engineer's build menu is called Barracks.
3. Admiral has the same icon as the Paladin. Why does it require 7 food?
4. Arthas or the hero with that icon has its tooltip missing.
5. Two heroes with Water Elemental? Even two with Devotion Aura, two with Avatar, two with Storm Bolt?
6. Ships don't take any food and are trained instantly. You can spam them over time.
7. How do you build an Arcane Castle for the Arthas hero? Alright the Barracks the Engineer builds is actually the Arcane Castle.
8. Why change the Sorceress into a Wizard when you've kept the other elves? By the way the Priest's icon isn't proper.
9. Why does the wizard have the soundset of the Hydra?
10. Units in the Arcane Castle don't have hotkeys except for the Lancer.
11. Arcane Towers can reveal for free but the Arcane Castle requires 900 gold for it and the area is not that big than the Arcane Tower's Reveal.
12. Fate Light has an active icon for a passive ability. You can make it look passive with this: Button Manager v1.8.2
13. You can train all heroes in one match?
14. The admiral doesn't have two starting spells like the rest. Many of these spells can be found on other heroes from other factions.

Orcs:
-pretty much the same issues with heroes. They have more heroes and no super hero like the humans, also no super unit building like the Arcane Castle.

Undead:
1. Acolytes of the burning legion have the same icon as the normal Acolytes. They can summon shipyards as opposed to how the other workers including the normal Acolyte create them?
2. Ships are incredibly imbalanced, apart from being powerful, now they have abilities and fortified armour.
3. After the shipyard finishes construction which is not on water like for humans and orcs but right near the edge on land, it doesn't look like the shipyard, it still looks like it's under construction.
4. Temple of the Burning Legion and Demon Gate can be built anywhere, on anything, out of blight.
5. Varimatrhas and the Dreadlord have the same icon.
6. Mannoroth has no hero glow. You can either find a replacement model or add the glow simply: How to add Hero Glow without Modeling
7. Archimonde is totally imbalanced, Tichondrius too, Mannoroth so on.
8. Conversion=Doom.

Night Elf:
1. Horn of Cenarius Pedestal can be built on anything.
2. Nature's Peace has an active looking icon when it's a passive ability. Same with Nature's Aura.
3. The Stone Giant has no hero glow and has fortified armour. Imbalanced.
4. Cenarius=Keeper of the Grove+
5. Avalanche=Cluster Rockets.
6. Neo has no hero glow and is too small for a hero.
7. Other issues present mentioned on the other factions.

Satyr:
1. Satyrs and Shadowdancers have the same icon. Same: Treant and Plague Treant, Soulstealer and Hellcaller.
2. Hunter's Hall and Altar of Elders. You could find different models.
3. Incinerator Satyr's description doesn't say what spells.
4. The treant hero has some spells that don't match corruption like that armour giving one and Tranquility.
5. All heroes have no hero glow. Also, only 3.
6. Shipyards can't be built like the other factions do it.
7. Dragons are just copy cats of orc red ones.
8. Ships are copycats of each other between factions.

Fel Orcs:
1. Forked Lightning and Monsoon have the same icon.
2. Black Dragons=other dragons.
3. Orcs build shipyards like the Satyrs, meaning you have to get to shallow water first.
4. Gul'dan and Moogul don't have hero glow.
5. Healer Ogre is a Witch Doctor clone.
6. Warlock has the same icon as the archer orc.
7. Upgrades for the casters look like the ones for the Shaman and Witch Doctor. The one for the Warlock even has the Shaman's description.
8. Wind riders and Wolf Riders have the same icon.
9. Mostly the same units as for the orcs but with Chaos damage which is imbalanced.

Trolls:
1. Troll Cabins can be built on anything.
2. Why two separate berseker trolls and not an ability to shift between the two ways of attack?
3. The Saber is named Glaive Thrower.
4. Another shop with Mask of Death, an imbalanced item. Even worse, the Soul Gem which traps heroes permanently or was it until the hero died(?).
5. No reason for so many troll priest copies plus the witch doctor which is already in the orc spirit lodge.
6. Hero glow for those who don't have it.
7. Aerial Shackles on the Troll Bat? But that's for the Dragonhawk.
8. A copy troll-bat with some changes.
9. The wolf has War Drums like the Kodo. Not original.

Draenei:
1. Seer's Den and Creature's Hub have the same icon. You could even make your own screenshot icon:
BLP Lab v0.5.0
Complete Icon Tutorial - All About Icons
How to Make an Icon
2. Many building icons from other factions.
3. Draenei house can be built over anything and it has level 0.
4. Again the Soul Gem.
5. Vindicators and Watchers have the same icon. Same: salamander hatchling and lord.
6. Two heroes without hero glow.
7. Vizier and Lord adept training look alike.
8. Poisonous Breath upgrade has a passive looking icon. It should look active since it's not a passive ability, it's an upgrade.
9. Shipyard?

Naga:
1. They are basically the campaign naga with little changes.
2. Tidal Lord and Naga Sea Witch have the same description and two of the same spells.
3. Witch Naga Sire=Naga Siren+.
4. Being able to move on water puts the other faction at a disadvantage.
5. Hero glow where it is due.

Elves:
1. What's the point of two Dragonhawk units with the same abilities but one being a ground unit?
2. Casters=Human's.

Demon:
1. Demonic Farms can be built on anything.
2. Lesser Voidwalker and Necromancer Voidwalkers have the same icon.
3. Fel Stalkers are imbalanced, they deplete all heroes of mana.
4. Slow Fire has an active icon.
5. All netherdrake icons look alike.