IMHO, losing the "friendship" can work in shining more reality on the truer side of D. She is in total fantasy about what your relationship will be after D. She thinks everything will basically stay the same between you.
Realizing that she will have no part of your life (friendship, family time togetherness, holidays, hanging out, etc.) can come as a shock. This is what needs to happen, for her sake.
Why not use these 60 days to show her how it will be if she no longer has you? To me, that is more productive with a WW than trying to show her how good things could be again.
Once a couple agrees to reconcile, then they can nourish the friendship. Until then, being her friend will defeat her stopping the D.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!