My H and I never discussed D so no 'official' paperwork of any sort was ever filed....so take MY opinion with a grain of salt.
I'm on both sides of the fence with this. One side says, withdraw the paperwork if YOU feel your Hs recent improvements are genuine and NOT driven by the looming S/D agreements. The other side says, postpone the court date to see if your Hs good behavior continues, but DON'T withdraw the complaint.
I'm thinking solely in terms of protecting your finacial security interests in the event that things don't pan out the way you'd like them to.
Our Hs can be very cunning and manipulative so I'm a big 'protect yourself financially' first and foremost kinda gal.
DON'T go for the divorce, of course, just keep the 'agreements' already established in tact.