There is no veil in heaven - separating a first apartment from a second. Where God the Father sits IS the Most Holy Place - and Jesus sat down at the right hand of the Father.
That said:
The two apartments - I believe - symbolized a change of LOCATION - and a special EVENT.
Thrones (plural) were put in place, and the Ancient of Days was seated. God the Father moved to a special judgment hall or arena, where thrones had been set up. One for HIM, and others for the judges of the heavenly "court".
THEN - The Son of Man was brought before the Ancient of Days. (Daniel 7:13)
I believe THIS will be the fulfillment of the Day of Atonement prophecy.
I do NOT see this as happening when Jesus ascended to Heaven immediately after His resurrection. The things going on - on the earth - I believe - tell us this is the very END of DAYS. The "little horn" is speaking blasphemy, and has been persecuting the people of God for "time, times and a part". The little horn persecutes the saints right up UNTIL the Ancient of Days comes, and a judgment is made in favor of the saints of the Most High, AND THE TIME COMES for the saints to possess the kingdom.
The saints did not take possession of the kingdom when persecution by the Catholic Church died out in Europe. They did not take possession of the kingdom in 1844. This is a FUTURE EVENT!
In my opinion - of course.