I agree that the 501st kicked ass and it would be awesome if they could be buildable, but it's Arbiter's decision is a good compromise between the extremes.
For units with no discernible difference from their regular infantry other than the special colours.
These are all of the special kinds of Clone Troopers (armour permutations, as opposed to classes.) that will be in R3: Plain white: Regular infantry. Shock Troopers: Trained at Coruscant on Tech V. 501st: Comes with Commander Appo 212th: Comes with Commander Cody Galactic Marines: Comes with Commander Bacara
I can probably guess the answer to this, but, could you make some of the legions buildable for a big price only on Kamino, that way they don't take up loads of room on all planets. They could act as minor heroes.
The point is that there is nothing special about them. Every clonetrooper belonged to some legion, and we can assume that every legion had their own fancy paintjob going on, but that doesn't mean we should put every single legion that ever existed in the mod just because they had cool armour. Cody, Bly, Appo and Bacara (or whichever clone commanders we do) will all come with a few squads of troopers from the legion they commanded.
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