Okay, so with that in mind, why wouldn't you see Revelation 11:15 and Revelation 11:17 as referring to the time when Jesus delivers the kingdom to God the Father?
Since you are Premil, I will assume you are saying that you don't believe that the end of the age will occur when Jesus returns, which is what I asked you about. The reason I asked that question is because in the Olivet Discourse Jesus was asked what would be the sign of His coming, and of the end of the age (Matthew 24:3). I believe that was one question and that the question implies that the end of the age arrives at the second coming of Christ. With that being the case then that would mean that Matthew 13:43 is indicating that Jesus delivers the kingdom to the Father at the end of the age when He returns and then it will be referred to as "the kingdom of their Father".
Matthew 24:3 Now as He sat on the Mount of Olives, the disciples came to Him privately, saying, “Tell us, when will these things be? And what will be the sign of Your coming, and of the end of the age?”.
Apparently, based on when you think the end of the age will occur in relation to Christ's return, you see this as 3 questions instead of 2 questions? If so, in which verses do you think Jesus answers each question? If that's asking too much, then please tell me in which verses you think He answered the question about the end of the age (assuming you see that as a separate question)?