BDave and Ify are both pretty well established in the actual play community. I've also had the good fortune to have played a few games run by BDave and he's a great GM.
As it stands there isn't a new source book set beyond what appears in EGtW so whatever time period Aeormatons start to return in shortly thereafter is separate
I think Orym is mostly a reaction to Vax and Caleb taking a lot of focus in their respective campaigns and Liam wanting a more "background" character this time around
I mean we probably can assume FCG has some degree of survivor's guilt already. I mean they were the cleric of that group and appear to be the only survivor which is probably gonna mess someone up
The Curse of Ruin was established in the lore as existing and being real in the Tal'Dorei Campaign Setting until it wasn't anymore in EGtW, Curse of Strife could easily get the same treatment
I think Haeck mentioned it being addressed in Tal'Dorei Reborn at some point, I'd imagine it'll end up like how the "Curse of Ruin" is depicted in EGtW