Albert Barnes Commentary Ezekiel 43:10

"Thou, son of man, show the house to the house of Israel, that they may be ashamed of their iniquities; and let them measure the pattern." — Ezekiel 43:10 (ASV)

Deviation from the exact rules of the Mosaic ordinances was connected with the transgression of the people. So the restoration, according to the pattern of the Law, was symbolic of their return to obedience.