Hello scarlotti I'm here!
Well, you know my situation. This time last year you were worried about similar things and then it seemed to get better. I'm guessing he saw it as a temporary fix and you hoped it was a permanent change? I know that one all too well!
With the PA thing, can I ask a couple of things, firstly when he says he'll do something are you grateful?
Because it can be more than PA, it can be a self-esteem boost to them too. My H would offer to do all sorts of things, or at least readily agree to do things, and I would say, "Thanks you're a star!", but then he'd never do them.
So the pay-off for him was immediate gratification (I'm nice to him). Logically it doesn't make sense because in the end they're going to get a negative response in the end when they don't do it, but that leads into the next bit; they get attention. Lots of attention, negative and positive. You nag them and they can feel "hard done by", but they're still keeping all the focus on them. This isn't about how YOU feel about it. It's all about them.
One of the main things with PAs is that they never had any intention of doing it, they just didn't want to say no (at least that's what I think it starts off as). Then they get all this attention for it which is a pay off (of sorts).
Now I know my H isn't the best example of a "cured man" but he has done a lot to sort out his PA in the past year. Mostly involving him making an effort to see things that need doing without me pointing them out (so he won't get any attention), and me only asking once and not doing it for him (this can take some imagination especially when other people are suffering for his inactivity, but there's usually a way, like mowing everywhere except where his things are)
Sorry, I'm not really answering your question. Just wanted to point out that PA is something that can be changed with an effort by him.
But that's not actually the point here.
If you want out your DCs will be ok. I know how hard it is to think about your own needs (hence my inability to think of anything except his problems even after he's gone), but your needs translate to the DC's needs eventually. An happy mum is what they want. As you say they would see their dad as much as they want.
DS1 said to me yesterday, "Mum, you know you're doing an even better job than when dad was helping". I could have cried. He added that living without tension was a good thing too.
That's my ramble. My brain is not completely linear at the moment