and WW is slowly doing the right things
What is she doing that is right? Has she identified why she had the A, what need she was trying to meet, and do you agree with her explanation? Has she attended IC or done other work to find new behaviors and perceptions to replace the faulty ones that led her to participating in an A? Has she read Not Just Friends by Glass, and/or Sexual Detours by Hines and discussed with you how they do or do not apply in her situation? Has she read and taken the Love Languages quiz with you so that you can both communicate love more clearly? Is she open and transparent about her life, access to her phone, email, etc? Has she apologized in front of you to others who were friends of her A, or knew about it? Has she revised any re-writing of the marital history, and do you both agree on the history narrative for your M? What has she done to demonstrate that she desires you as a man, appreciates you as a friend and husband?
I see she did break NC after dday with 2 calls, and that she still works with the OM. What extraordinary measure has she and is she taking so that you can feel secure after she broke NC in the past and has daily opportunities to do so in the present through work?
If she has just quit texting and fucking her OM, and made few other changes no wonder you feel so ambivalent.
I'm not even sure where I'm supposed to be moving on to because at this point I no longer know what I want.
Where would you like to move on to? Independent of what your WW does or does not do, what would YOU like the next year to be like? What would you like your life to be like in two years? What can YOU do to make progress towards YOUR goals?
If your WW does many/most of the things in my first paragraph, and addresses the issue of still working with him, then you will likely not feel that she got away with cheating, and as you heal you will feel better about the tow of you. OTOH, if she does not do many of those things, and you focus on you for the next year or two, you may never again feel OK about your WW and your M, but you will have moved forward on your own path and not have wasted 1 – 2 years waiting to see what she does.