I'm sorry to read about your XH's behaviour. It is common for them to be slow or non responsive. I think they just can't really deal with difficult or onerous stuff, which feels overwhelming.
With my XH to an extent I had the same and a couple of times I used the technique of - XH, I'm going to move forward with X next Monday. However, if you have any concerns, please get in touch before then.
Or something to that effect. So you are informing and also giving them the option to halt if this isn't what they want or have concerns. I wouldn't over-use this, but for the occasional pressing thing, I think a politely worded note like the above is fine.
Take care and I'm hoping 2018 will be a great year for you xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus
