1) The divorce is not your fault, and it is certainly not your fault if he decides to hire a lawyer. That is entirely up to him.
2) You have absolutely no reason to hurry this along, so this 2-week wait is just fine for you. At this rate, DD will have graduated and H will have retired before the divorce, and a lot of your unresolved issues will be moot!
3) H's offer is totally inadequate. If for some reason your lawyer were to allow you to accept it, you could probably sue her for malpractice!