I think common sense is the best tool for evaluating candidacy for R. I took the advice from SIers, who seemed to agree that a good R candidate
- goes NC, even to the extent of getting a new job;
- gets scrupulously honest - no more lies (really, none), answers all questions (even when the questions have been answered again and again);
- gets transparent - opens all electronic media, keeps BS informed of location, activities, and companions at virtually all times;
-starts/changes IC with a goal of changing from cheater to good partner;
- backs off blameshifting, minimizing, and trickling the truth (i.e., may start doing these things but stops);
- works with BS to resolve issues that come up;
- MC when one (or both) partners want it.
You're right - you don't describe a good candidate for R. If you'd like to R, my reco is to lay out your requirements for R and see how she responds. If she signs on, R might have a chance. If she won't, you know R is not a good bet. She might be so scared that she doesn't know what to do, so knowing your requirements might be what she needs.
Again, if you're neutral on R/D or want D, there's no point in laying out your requirements; continue letting her sink or swim until you're ready to quit waiting. IMO, this isn't a moral choice. It just depends on what you want.
*****
Like Bigger, I'm in favor of giving up trying to control the outcome. Go for what you want - just know that you can't always get what you want. No one can. But if you ask sometime, you may just find you get what you need (Thanks, Mick Jagger and Keith Richards).
IMO, healing is the most important goal after being betrayed. That means (again IMO) processing the feelings out of one's body. If you do that, I'd bet a lot that you'll have no trouble with mind movies. You might see them once in a while, but they'll be easy to control.
Facing one's feelings is scary, hard work at first because being betrayed brings up every self-doubt, self-disgust, and self-hate one has ever experienced. It gets easier, IMO, as one finds the self-doubts, etc. are easier to knock off than one feared.
And doing the work is easier than living with the pain.