And equally.. Paul shows that much of mankind "sleeps" in death awaiting the resurrection as Our Lord deems fit.
There is no perpetual bungy jump across the universe, but an orderly restoration of All things in Heaven and on Earth, and a resurrection with a purpose.
WT doctrine is NOT constantly shifting Stephen, it has progressed and for the most part rejected false Hellenic/Chaldean influences that have corrupted the Judeo/Christian church of the first century. Agreed, there are areas of WT teaching that need revisiting.
Their understanding of the Resurrection is however, much clearer than that of the Established Church. I urge you again, to read THE WHOLE of 1 Corinthians 15 and pray for the Holy Spirit to guide you as you do so. It is wonderfully revealing.
Blessing
Podo