Hi,
I dont have access to your second document.
To give you some feedback, I really appreciate the effort put into this and it does make sense, given that the playstyle of Angmar would also fit to Harad (except for the Warhounds, I'm not quite sure if they would fit into the eastern setting?). However, I like Angmar far to much to have it eraised as a faction from most of the normal maps.
I don't know what FG15 wrote to you, probably that the Spellbook would be the problem? Edain Unchained Submod had its own way around that, that works for me, but probably would be too much for occasional players who aren't that much into the game. There would also be your option to make the Spells more or less the same and you are right, I also think that this would be fitting for every spell (all spells could get neutral names and have visual effects, that would depend on your chosen faction, e. g. "Plague" would be a plague of locusts for Harad; "Summon Hill Trolls" would be renaimed into "Summon Trolls" and involce different Trolls for Harad, ...).
So yes I can see why this idea seems to be a real good solution on how to include Harad and I could also see a way where it could be done without forcing Angmar onto the Arnor-Maps. However I do think that Men of the East could be much greater if being included as a seperate faction. There were already suggestions of mobile buildings in a nomade style etc that could bring us a very differnt playstyle. Most of this would be gone if they would be forced to fit into the Angmar playstyle and we wouldn't really get an entirely new faction.
Also I don't really share your conceirn, that the Edain Team couldn't fit in another faction after having included 2 others. First of all, I don't think that we will get them very fast, second of all, if there would be a third faction, it would probably much less source material then Men of the East or it would have to be a faction, that didn't participate in the War of the Ring. Either way, it would probably better be included into an Arnor-like Mapfeature.
I'm looking forward to your changes in the second document.