The meaning of changing shape is to show lowly warriors become the champions of their race.. it also lets you buy cheapish troops but let the shape which summons units be much more expensive in upkeep.
I'm happy you like the mod, keep playing and keep giving feedback, I've changed the predator/spider thingie (the regular predator also becomes a spider

)
What is wrong with commonwealth?
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Want a blend of
fantasy and
sci-fi? Try the total conversion
Dominions 3000 mod with a new and fully modded solar system map.
Dragons wanted? Try the
Dragons, Magic Incarnate nation.
New and different undead nation? Try
Souls of Shiar. Including new powerfull holy magic.
In for a whole new sort of game? Then try my scenario map
Gang Wars.