When Jesus told the parable of the sower, He taught the disciples that He spoke in parables because the people would not understand and then taught the disciples what His parables meant. I tend to believe that anyone searching Scripture and meditating on these parables would be able to arrive at their meaning. Of course, today, we have the book Christ Object Lessons to consider when studying what Jesus taught.
However, IMHO, the desert sanctuary and the Jerusalem temple were also parables. The desert sanctuary was one huge physical parable with its services and it summed up the entire plan of salvation. Central throughout the sanctuary message was Jesus and His various roles in the whole plan of salvation. God does not waste words or symbols and there was very little in the sanctuary or its services which does not have symbolic meaning related to the plan of Salvation.
Entering into the Most Holy Place on His return to heaven would have been inconsistent with the temple services and holidays. The earthly sanctuary and the heavenly sanctuary are very consistent with each other. The day of Atonement was one day of a year. If Jesus entered the Most Holy Place immediately on His return to Heaven, then the Day of Atonement would have lasted most of a year in the temple calendar.
Of interest I find that everything outside of the Sanctuary itself (in the courtyard) were parts of the plan of salvation that happened on earth. This would have been the sacrifice of the animals and the sacrifice of Jesus. This roughly corresponds to justification and/or reconciliation. The Holy Place has it part in the daily life of a Christian and is largely a heaven supported activity and corresponds to sanctification, hence the symbolism of the Holy Place has much to do with the Christian life. The Most Holy Place is an end time event in the plan of salvation and has much to do with glorification which is not completed until the return of Jesus.
For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life. Romans 5:10
You have a bit of a problem here. If 2300 morning-evening works out to 1150 days, then 1260 days works out to 630 days! I think you are mixing in the morning and evening sacrifices and according to Paul, those evening morning sacrifices ended at the death of Jesus and would not be part of a 2300 day prophecy.