The who, what, when, where and how were spelled out. In contrast to that, we see in Genesis very few rules about how the patriarchs worshipped. They did not have a designated priesthood, were not restricted to a certain place, and were told little about what to offer or when to offer it. Worship activities are not restricted to a certain group of people or a certain place. Christ did away with Mosaic requirements and restrictions.
All believers are priests and continually offer themselves as living sacrifices.
Worship, to be acceptable, must be exclusive. God requires all our love, all our allegiance. We cannot serve two Gods. Although we may worship him in different styles, our unity is based on the fact that it is him we worship. In ancient Israel, the rival God was often Baal.