#1 here is important. the bonus of being industrious is largely the fast workers. Thus it would save Isengard 1 or 2 workers for those 1-4 cities. It may sound fitting, but from a gameplay point of view it's peanuts. Besides, I'm not really fond of the names of the traits, and proposed to PCH long ago that we could rename them. So we could rename Religious to "Oldknowledgy", fitting elves and Saruman.PCH: I have no problems with Scientific and Industrial, but two things to bear in mind: 1.) How helpful would it be for a 1-4 city civilization? 2.) The only other civ that has the Industrial attribute is the Dwarves.
Besides, the "religious" trait (however we spell it ) would give Isengard easier border expansion, something sorely needed for this particular civ.
Regarding the discussion on the colour of the southrons I think the quote about "black faces, white eyes and red tounges" say it all. But regardless what the books say we have to work with what we have. No one is gonna create 15 new southron units for us...
Unless you propose that some archer units should have a bombard range of 2 tiles (which is ridiculous) this isn't possible to achieve. But PCH proposed good stats for the 0 range bombards. I hope that's satisfying.Foehammer: Also, Hobbits should be flat out deadly with bows and missile weapons and military units should be given ranged attack: short range compared to Men and Elves, but within that range they practically never miss.
The idea to give invisibility to hobbit units is very interesting, but have some drawbacks that would have to be weeded out first. If we make either the offensive or the archer lines invisible the Shire would be a bad ass attacker, which is not at all fitting. If we made the defensive units invisible the cities would look empty when they aren't, also strange. Besides these would be deadly pillagers...
That leaves settlers, workers and scouts among the land units (we aren't giving them invisible planes, are we? ). PCH talked about the danger with invisible settlers. I propose making the workers and the scout(s?) invisible. Not gamebreaking, but nice perks.