Hi 36,
I am a great advocate of listening to your inner voice, or trusting your gut. And the fact that you have uncertainty about your wife's proposal suggests that it is not 'right' for you as things stand now.
Maybe a renewal of vows can work for people who have achieved a dynamic that is positive and reassuring, where the betrayed spouse genuinely believes their wayward spouse has grown significantly and appears changed and fully committed.
I get the feeling that a dynamic like that does not exist between you and your wife currently, which is why my gut says a renewal ceremony may not be right for you.
Having followed your story from its beginning, and having heard you repeatedly say that your wife has really made very little effort to work on herself, identify the mechanism that enabled her to cheat in the aggressive way that she did, and demonstrate that that mechanism has been pulled apart and replaced by something better, it is hard to have confidence that she is any different than she was when she had the affair.
So when I read...
A renewal of vows will be just like starting over. No secrets. No infidelity. No grudges. We would reenter marriage with a clean slate. If we have a clean slate it will be much easier for us to move on as a couple.
...I may be a weary old cynic, but I just see someone who wants instant total absolution, followed by no obligations to do any work or demonstrate any changes.
That may be great for her, but what does it achieve for you? If it happened, would you be expected to say nothing more about the affair, your pain, or any of the issues related to that?
To me, it seems like she wants the prize of reconciliation combined with total forgiveness and an erasing of everything she did without doing any of the work that would make that an appropriate step to take.
And I see that as counter-productive. If she wants those things, she has to do the work to convince you that she is changed enough and committed enough that you will feel like making the suggestion of a renewal of vows yourself.
And she has not done that, so you do not feel this is an appropriate point in your journey to be going through such a ceremony.
The other thing that strikes me about the way the it was couched is that there was no focus on making things better in the future, and working to avoid anything like the affair happening again. The emphasis seems to be entirely on erasing the past and all of her accountability for her actions. Which is all about her, and not at all about you and the damage and issues you are still working through.
Maybe one day such a ceremony will feel right for both of you, but you are still processing and trying to heal, and your wife has done virtually nothing that she should have done, so both of you have some ways to go before any vows should be renewed.
Those are my thoughts, for what they are worth. And as ever, my thoughts are with you.