The effort needed to get the ban revocation recognized in all communities he felt would be too overwhelming for him to accomplish
That probably means there was a lot of oppostition from other Gedolim at the time.
Also the Baal Shem Tov never spoke about the ban revocation so that definitely souldn’t effect the Chassidim even if it would go through with the Misnagdim (or whatever they were called at that time).
The precise reasons why the ban revocation didn’t go through doesn’t matter. The bottom line is that Hashem guides His world and He was the one that didn’t want the ban revocation to go through.
I know there is no way I would stay with my husband if he took on another wife.
I don’t know if many women would stay with their husbands.