Back to question A: my former husband feels lots of remorse, and gave me heartfelt apologies. But the remorse and the regret have not been enough to make him stop drinking, or be able to learn from his mistakes, as far as I can tell-- granted, this is an outside impression, I don't know him that well anymore.
BTW he went through a golden boy phase during our divorce: worked out, got a new girlfriend, bragged to me about how much healthier their relationship was than the one he had with me. Two years later, he's gained the weight back, his relationship has gone downhill, and he's begun the process of mentally making the new girlfriend the 'bad guy' (this from comments from my daughter).