we hold to Christ being the high priest btw. actually from 1 peter 2:5 i can see that there is a house and a priesthood i do not see where everyone in the house is automatically in the priesthood, Hebrews seems to specifically do away with the Levitical priesthood but does not seem to do away with priesthood at all but rather change it.
The High Priest is now Christ.
So the Aaronic one is done away with.
Christ is Prophet, Priest and King.
When He returns He will return as King.
Regarding 1Pe., Peter is addressing individual Christians as being Priests, thus having direct access to God.