55 years married! Wow. That is a great milestone. Hope you guys hit the mark as well and have a happy anniversary.
You commented about still experiencing "no intimacy"...I can understand your W's POV. The sexual desire comes back long after the reintegration process after coming out of the MLC fog. It seems to me that your W is not yet quite there.
On the other hand, you don't want to stand for too long and have the M slip into SSM territory. That is something for you to monitor and decide when the time comes around.