If you are a fairly hardcore player, it is a lot more than that.  Stategically, there is a lot more depth to the new units, spells, new rules for previous spells. 
 
Also, there is another add-on which adds quite a bit more, but it is still under translation.  It is called the "Red Sands" mod which is actually developed/worked on by the original KB:Crossworld's team, but the problem is it has not been fully translated. 
 
It adds another continent and even more units.
		 
		
		
		
		
		
		
		
		
	
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