Major Mishap said:
Don't see why you would need to add uneccessary complication in designing an army, if the points values are fair and balanced then it won't be a problem.
Because what I propossed isnt complicated or unneccessary and the points values are not fair or balanced. So, it is a problem! LOL.
You already have such rules in the game as it is. One of each hero (rather obvious, but believe me, Ive seen and know people who would argue that), one of each Armor Type Command Squads.