This is pure, unadulterated insanity of a mod. Literally Warcraft IV. What I would like to emphasize is the visual design and clarity - it feels like an extension of WC3, most units and buildings do not strike me as from some other game, they do look at home when compared alongside the original roster. At the same time, they are not simple recolours, with so many new styles and mechanics they do pretend to be something more, something that needs a good story to correspond with it and to explain it, to draw the player into it.
I have just learned of this mod (or should I say, a compilation of maps, because WC3 does not allow multiplayer mods, unlike C&C: Generals, for example) from Grubby.
I shouldn't have been surprised that you started working on it in 2002. The quality of your work is outstanding. You went through so much stuff already in the game and respectfully integrated it into your creation (i.e., the Wand of Neutralization). The vocabulary is mostly clean, precise, stylish and inventive. The moment I noticed the masterfully crafted custom UI, I knew it was not an ordinary trash modification.
My complaint would be that the hired catapult's splash effect looks overly big, and the circling flaming stones above the teleporting buildings of the Lost race are placed too high. Grubby mentioned that the ordinary T1 unit of the Lost race may be confused for a summon (they are too thin, I guess?).
Also, some rare tooltips do show inconsistent style or are just not good enough. For example, you've improved the description of Sleep (by adding missing info).
"A sleeping unit can be awoken by attacking it". > Why not "by being attacked", or, even better, "is awoken be attacked"?
Another case is Derelict's Palette spell, "Proxy summon units as needed at the cost of mana and charges". Do the words "proxy" and "needed" have a place here, from the point of style? And, about mana and charges, if units do take fixed amounts, you might change it to "required mana and charges", but I'm not too sure about how it works anyway.
P.S. Is Kael'thas dead?