Just to clarify. We're playing out the War of the Lance, not the period before it. This is an alt-history take on the WoTL, with a bit of time traveling tossed in.
Funnily enough, thinking about it, I think this campaign is a great example of why I don't really care that much about D&D lore. We've already cocked the lore of the WoTL in a hat. The bad guys won. We took on the role of the Heroes of the Lance and we failed. The dragon armies have won and Takhisis is ascendant. Now, we still have a chance to set things right, and we'll see how things play out, but, at this moment, the history of the WoTL is completely different.
What bothers me, is that a great campaign like this can NEVER see the light of day outside of our group. WotC would have to be suicidal to try to publish this. The "Lore uber alles" crowd would lose their collective minds if this were to be published. Heck, advancing the Forgotten Realms timeline a couple of centuries proves that.
Me, for me, I WANT more versions. I WANT alternative lore. That's why I loved 4e lore. Not because it was better than what came before but because at least it was DIFFERENT than what came before. It was an attempt to revise what came before and present it in a new and fresh way. 5e, to me, is a huge step backwards because not only are they going lore heavy (which isn't necessarily a bad thing) but they are locking in that old lore again. No creativity, no new ideas. Just the same old stuff recycled yet again.
To me, Eberron was a huge breath of fresh air. D&D that was different. I loved Scarred Lands for the same reason - such a huge departure from how settings were presented (Scarred Lands was Points of Light long before WotC coined the term).
I don't want same old same old. I HAVE the same old. I've DONE the same old. Gimme something new or don't bother.