I understand those objections, but still see this as being the view that most explains how this earth will have the Kingdom existing over all the earth, and how all worship Him as their Lord and King, as OT prophets foretold of His Messianic Age.
As I mentioned earlier, how do you come to this conclusion - especially as a Calvinist?
If you believe that God can raise a dead man to life, and give life and joy to a dead heart that hates him and his Law, than why can't you see God doing this on a mass scale so as to expand his Kingdom and Church upon the whole earth?
Why does it seem to you that Jesus has to come and reign with a literal rod of iron in order to bring his Kingdom upon the whole earth and uphold his Law? Psalm 110 is, after all the most quoted OT Scripture in the NT.
Again, the Great Commission is clear: disciple the nations, baptize and teach them. Likewise, the very purpose of the New Covenant is clear: the Law written on man's heart so that, eventually, no one will have need to say to their neighbor "know the Lord." None of this, in the context of the Scriptures that we find them, are merely looking forward to Jesus' second advent. Rather, they are seen as being definitively fulfilled in Christ and progressively fulfilled in his Church
now.
Of course, there is a sense in which the mission of God will not be completed until the second advent. No one is denying this. But, not to question your piety and love for God, you seem to be working on an entirely pessimistic basis and you seem to revert to the idea that this does not seem plausible - as if God cannot do these things.
Again, I must ask you, do you believe that God can raise dead people? Do you believe he has done so in Jesus Christ and has given us that same very Spirit that raised him from the dead? Do you believe that he takes his enemies who hate him, gives them new hearts, and adopts them as sons? If he can do these things which
seem impossible, why does it not seem to make sense that he could accomplish the seemingly impossible task of using redeemed sinners to expand his Kingdom upon the whole earth until the day when he defeats death itself?
"And he said, The things which are impossible with men are possible with God"