Great name by the way! , I think the philadelphian church will not go through the great tribulation (not to be confused with the daily tribulation that some philadelphian-like christians have gone and are going through nowadays), as a matter of fact, will probably at some point be raptured while all hell is breaking loose (kinda like whats happening right now, i think the rapture is going to happen any of these days and is much closer than what many-sleeping christians think...) the rapture is a secret day, and since the seals are opened in the heavens by Jesus, this means we really don't know for sure at what moment they are opened, but being spiritually awake and led by His Holy Spirit, we should know or discern them being opened by the effects their openings have on the earth, I believe that the church is not appointed to wrath but to salvation, which means that we "must" be taken out of here before Gods wrath starts (before or during the 6th seal...).
When the rapture happens, we who are raptured will meet Jesus in the clouds and then go to a great supper with Him (somewhere in His humongous kingdom) while the earth goes through great tribulation.
You mentioned that God and the Lamb are the temple, I would agree, as a matter of fact, I think that when it says that we will be in His temple and not go out of it, means that we will be in the most intimate place with God and His presence (simbolic-like the priests that served in the temple during the temple days...) hence the promise Jesus made in John 14:
1Let not your heart be troubled: ye believe in God, believe also in me. 2In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you.
3And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also.
This pretty much means that wherever Jesus is, we will also be there with Him and never again leave His presence, Paul spoke saying that we will judge the world and even the angels, this is an awesome statement he makes on 1 Corinthians 6:2-3, and pretty much gives us an idea of where we will be at in the future:
2Do ye not know that the saints shall judge the world? and if the world shall be judged by you, are ye unworthy to judge the smallest matters? 3Know ye not that we shall judge angels? how much more things that pertain to this life?
During the MK, Jesus will be reigning physically on earth which probably means that we as divine beings with a new nature will be reigning with Him, our home will still be eternity with Jesus, but that doesn't mean that we wont be able to travel wherever Jesus wants us to, to carry His orders during His reign on earth, but regardless, our home will be with Him (His temple, to never again leave Him). As far as positions of authority goes, i think that will be part of our rewards, God is a just God, salvation is through faith, but rewards are through works in Christ, in heaven there are hierarchies (sorry for my spelling...), I believe that all of us will also have rewards based on our works in Christ and therefore also have different positions in His kingdom! as far as I'm concerned, my greatest worry is to get there! (through faith) hehehe and try and make some good rewards while at it (through obedience, which goes by the hand with true faith...).
There are still many mysteries of that future, but regardless, whatever plan the Lord has for us, it is better than what we could ever fathom. I learn new things everyday! whether its through the doves or through directly reading His word, I try and find the pieces and puzzles in the Holy scriptures and put them together just like everyone else here at the Doves, but I'm delighted to exchange ideas and interpretations with all my family in Christ here at the Doves, I've been truly blessed by everyones take (in spite of the different points of view) on this whole history that is yet to be completely fulfilled (in our eyes, anyways) because to our Lord the future is already history!
God bless you brother!