I more or less agree with CragLord: I appreciate a new design for the battle wagons / war chariots for the old one really looks that way at least in certain parts (the dwarven soldiers are of Edain's quality but that doesn't count so much for the pulling animal).
However I would prefer to keep their upgrades the same but differentiate their abilities: E.g. IH could get the Cross Bow as an active ability (this should really be only temporary IMO), Erebor could get the Barrel and Ered Luin the spikes at the side as a passive ability, because Luin is the tankiest sub-faction and therefore wants to get in your face.
I don't like the idea of completely different upgrade sets or systems for one sub-faction. Especially because things like the banner are actually pretty important with their anti-fear bonus, so every dwarven realm needs access to that.
However I would suggest for a more coloured version of the chariots: The dwarven armor in Edain is actually relatively colourfull (not like the mainly iron grey platemails in the Hobbit), so this really pale look would really stand out.
Greetings
Melkor Bauglir
PS: There are too many open threads around here.
I can't answer all of them...
PPS: Dwarves are really getting pretty "goat heavy". I don't really know if this is everytimes a good idea tbh -they look fairly nice and have about the right size for dwarves, but I think they aren't that strong actually. I mean, these chariots weight a lot and the goats I have seen untill now are all really lightly creatures. Just wanted to point that out before we go too far with our suggestions.