It is impossible to make a blanket statement whether it is appropriate to ever withhold a get.
However, the posuk says “sefer krisus” and the gemara learns that it must be a dover hakores and it needs to be a complete krisus.
If there are matters such as child custody or the recovery of assets or other issues (such as lifting restraining orders) then there are still issues which still bind the two. You would not be able to say that there is a krisus.
I am not suggesting that there would be a psul in the get, but I think it is also to simple to say that there are not legitimate reasons to withhold a get.