The L-rd was willing to give people a temple back, but the temple was not the point.
The Tabernacle as an end in itself was never the point.
He is using the restoration of the temple (Ezekiel 40-42) to remind the Jewish people that He wanted to have a relationship with them.
The relationship was the point.
As the heart and soul of the canon is Deuteronomy 6:5 (love relationship with G-d), understand that He wanted to have a temple not for its own sake, but specifically so that it could be FILLED WITH HIS GLORY.
He still yearns to WALK IN, WITH, AND AMONG HIS PEOPLE. That is what the dative preposition ἐν ususally means.
He cried out in a loud voice on the last a greatest day of the feast (John 7:37-39, and then it says He was not yet glorified.
The purpose of communicating that point, is for us to realize the L-rd was designed to be glorified and walk among us as our Father and we as His children.
This communicates intimate relationship, which has always been the point. Connection is the priority over protocol. Not that protocol is not important, but protocol is a piece and like a bit of seasoning, whereas intimacy and relationship are the main dish.