Ok here is my opinion:
-you have 3 archers which mean you have 3 units with same role. That is unneeded and would be better to make regular archer upgradable to ice or fire version. Similary you also have 2 basic melee units
-The workshop building doesn't fit and can be built in 1st tier.
-All spellcaster have their spells without upgrade, And warden can have damage upgraded 20 times and since she is rather cheep unit and takes only 2 food it really is unbalanced. They all also use hero models and that can be confusing
-You need another flayer beside dragonhawk rider. All races have at least 3 flayers.
-tool-tips need work cuz upgrades are still for mortar team, griffin rider etc.
-Heroes are uh just blademaster and paladin with different models (blade still has same icon even) and you can make as many as you want paladins and blade needs stronghold still.
-Elven knight doesn't have disabled icon it was just green for me.