Regarding the above the meaning to "there shall be no more time and the Mystery of God would be finished" is referring to the fact that immediately following that, the seven bowl judgments will bring God's wrath to their completion.
Even the parable of the wheat and tares teaches that God begins to move against the tares first before he gathers the wheat which jives with a 7th trump ingathering
After the church is gathered, there will be another group on the during that time who are referred to by the elder as "those who come out of the great tribulation." We are introduced to two groups in Rev.7 who are not the church
1) The 144,000 from the twelve tribes of Israel
2) The great tribulation saints from every nation, tribe, people and language (Gentiles)
This is why I continue to point out that, the church is never mentioned again after the end chapter 3.
Revelation 1 - 3 = Church mentioned, but no hagios/saints
Revelation 4 onward = Hagios/saints, but no ekklesia/church
The above is very significant in recognizing that the church is no longer mentioned within the narrative within the events of the seals, trumpets and bowl judgments.
I was raised in a church that emphatically taught the imminent return....I no longer believe that...there are too many scriptures in context that teaches a post Great Tribulation pre Wrath ingathering.....
Forgive me but, you have come to that conclusion because you are reading scripture that pertains to the great tribulation saints and Israel and not to the church. Matt.24:29-31 is referring to when Jesus returns to the earth to end the age. At that time, the angels will be gathering those saints who make it through the time of God's wrath until Jesus returns. It is not referring to a resurrection as some have claimed. Matt.24:29-31 is synonymous with Rev.19:11-21. Regarding this, if you will notice, the bride/church is seen following receiving her fine linen, white and clean and following the Lord out of heaven riding on white horses, which would demonstrate that she is already in heaven.
If you understand that the opening of the first seal is the beginning of God's wrath, then that is the time period that Jesus is going to keep believers out of, the seals, trumpets and bowl judgments.
While it is true that the believers will have trials and tribulation, we are not appointed to suffer God's coming wrath, which is not the same as the common tribulation that Jesus said we would suffer.