I don't think that her headspace is typical for this forum. WAW and WW descriptions capture part of what is going on, but on the individual level, she is really handling this calmly (ish) with a great deal of planning and logic behind her decisions (most are actually fair)
this is my W too. Is your W a very determined person? Makes decisions easily? Mine is, and this is how she is. I think she's powering through because it's a decisions she's made that she feels it is fairest to continue on that path. Perhaps she sees the pain that could be caused by waffling back and forth. And so she thinks a calm rip-off-the-band-aid approach is best?
I don't know, for me the calmness makes it easier in some ways, but harder in others. I can't point out the monster and say "This is not my W". But then I get glimpses, so I know that she IS in crisis, and not just leaving out of the blue. For them it is still very real.