The main point that these texts are making is not simply that God is unchangeable, but that God is unchangeable about his commitment to bless his people. And those additional words make a huge difference in how the message of divine immutability comes across. Unchangeability is not necessarily a valuable end by itself, and in certain contexts it would be bad, as we will see. What makes it good is that God is unwaveringly committed to doing good.
The doctrine of immutability should be related to thd consumation and blessing of God for his people.
