My friend, think of this. If they were removed Solely for "Balance" reasons, then why not tweak the costs of the units or tweak how much food they eat or tweak something else to make 10,000 man armies more viable? They Already Know a LOT of people want to have Massive Battles like those in LotR or Dragonlance, and yet they still took out the 10,000 man armies for "Balance" or because it was too time consuming for the average player to play through a battle. Why not simply re-balance the numbers so larger armies are possible?
Because those things aren't the problem, and changing them changes balance in other parts of the game? You're looking at something in isolation and saying "change whatever it takes to make this work", which would have dramatic impacts on everything else.
The problem is how do you balance champions against 4 units in the early game, and 10,000 later in the game? That's an astronomical amount of scaling that would lead to your champion being completely godly if you managed to get ahead of the army size curve.
Whether or not a battle is "fun" or is "too Time Consuming" is One Person's Opinion. Nothing more, nothing less. In my Opinion, Large Epic Battles are the most fun, whether they are Turn Based or Real Time I don't care. I also don't care if other people think it's too much micromanagement. They won't be playing My Version of Elemental. They'll be playing theirs.
Whether or not changing every number in the game to make the number you want possible is "too time consuming" is not really an opinion, and even if it is, the only opinion that matters is that of the project manager. They've got a lot of game to work on, and someone decided that it would take too much time to make the numbers work as compared to removing the huge army option. Besides, how would you even train 10,000 at once? There's no city that big to draw the people from.
On a side note: They've already shown us how to add abilities in code
They haven't shown how you make an ability then add it to a standard soldier through training, which is what I was asking about.