To be honest, I’m probably not going to download Enclave Resurgent, mostly because I am gingerly trying to navigate through the thicket to get a three-faction ending where former Paladin Danse is safely administering my Nuka World possessions for me*. Also, I have my own half-fanon, half-metagaming theory about the Enclave in Fallout 4: to wit, I think that Bethesda originally intended them to be there, but the game got too big, so they got downgraded to the Gunners. And, also: I’ve noticed that when there’s a certain tone in the description of a mod – a slightly aggressive, somewhat exasperated tone – you can’t really expect good bug support. And there’s always going to be bugs in mods.
Still, if you’re missing having the Enclave around this is certainly going to give you that.
PS: Short version: the Enclave is the remnant of the old, pre-War US government. They’re generally schmucks, but they always had good gear.
*The Commonwealth will be too dangerous for him, and Far Harbor is too weird. Nuka World is perfect.