Hi there,
It's impressive that you're executing on your plans to separate. I understand the whole process can be destabilizing, and even seem surreal sometimes. You've got this community for a "reality check" if you need it.
The thing that gets me about your wife's reaction is her apparent ability to "pull herself together" when she wants to, to try to get what she wants. I've seen that with the pwBPD in my life. I can't help but feel like the BPD behaviors--lashing out, extreme moodiness, petulance, entitlement, meltdowns, etc.--seem to some extent intentional. It's like she has the power to decide when to reel it in, and when to let it all out. Maybe we all decide that to some extent--when to be on our best behavior, and when to let our guards down. But with BPD, it sometimes seems calculating, and always self-serving. But you know from decades of experience, that this won't last long. Without therapy, she doesn't have the stamina to keep it up, and she'll revert to her usual habits soon enough, maybe as soon as she realizes, you're serious. She plays games, but you don't.
As for the smear campaign, I think that's her victim mentality shining through--she's always the victim and won't abandon the narrative. Sometimes I think that the victim narrative is core to her identity, because if she's not the poor abused victim, then who is she? She tells herself (and anyone who cares to listen) that she drinks because she's victimized. She tells herself that you are abusive, controlling, selfish, unloving--these are in all liklihood projections of how she treats you. I suspect you understand this, but I'm writing it so you see it for what it is and don't start to doubt yourself.
All the best to you in this next phase.
Yeah I don't think she can keep it up. I think she was advised by family or perhaps a lawyer to stop drinking. It helps her not lose it easily but it's really hard to see her not spiraling at some point... Could be tonight. She doesn't yet know I have actually hired a lawyer. She is still in denial. Making promises to do anything, has apologized for some behaviors, prays, but it's a bunch of bologna

. I'm getting reports even today of people hearing things from her about how she's scared of me! How I've controlled her our entire marriage. A lot of nasty stuff... Thankfully I have a few important people to me (including a couple in her family) that know the 100% truth and have my back and have set the record straight to those that will listen. The others don't really matter as I probably won't see them again.
Could see her spiral after tonight. I'm going to talk to her again and just reiterate that I'm still moving forward, I have a letter drafted from my attorney to give her so this will make it 'real'. It will be very interesting to see if she's able to maintain the helpful, amicable and sober front after this. From then it will be her choice to either disclose financials to each other and try to come to a settlement or I file and we move forward. I believe it will be the latter.