I guess this is where I’m struggling right now. So...no affection at all? Not even a kiss on the cheek / arm goodnight and a verbal ‘goodnight’?
No kissing. She may actually be repulsed by the thought of kissing you right now, as much as a shock as that may be to you it happens a lot with WAS's. It's fine to wish her "goodnight", there's nothing in DB'ing that says to be cold/ rude/ indifferent.
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I struggle with this because one of her consistent early complaints (areas of anger / unhappiness) has been about sex (frequency and different practices and such). I think to myself: if she’s so unhappy and angry with me because I haven’t been giving that to her as much as she wanted in the past, would doing a 180 mean giving her more?
This question comes up a lot. You are quite right that if she complained about lack of sex, a 180 on that would obviously be more sex. But when an unhappy wife tells you things she has issues with, she wants you to change them. When a WAS tells you, to her it's "too little too late" and she's just explaining/ justifying why she wants to end the M. So you can do 180's on your personal behavior but not on anything that has to do with her because she doesn't want that right now.