Seeing how important the Olah is to the general scheme of korbanos we are left with a glaring question - why wait until the second parsha dealing with korbanos to introduce it ? In parshas Vayikra we dealt with all the personal korbanos - even getting to some infrequent cases like the korban brought by a Beis Din who erred in judgment. What is it about a personal korban, a korban yachid, no matter how infrequently brought, that seems to take priority to a public one, a korban tzibbur, even one as basic as the Olah ?
Perhaps we can understand the role of public korbanos like this :
The essence of a korban is a visceral connection with the slaughtered animal. We devote ourselves to Hashem vicariously through the animal. This is essentially a private act. Every Jew must dedicate himself to the One Above at his pace and on his own terms - some an Olah, some a Shelamim and some a sin offering. It is personal to each Jew.
The purpose of korbanos tzibbur is to make sure that everyone gets in on the action.
No member of klal yisrael should be without this potent divine service - and no divine service can really function without the participation of all of Hashem's children. Thusly, a korban tzibbur is there because every Jew should be bringing korbonos yachidim, which epitomize the sacrificial service.
A korban tzibbur also demonstrates that it would be unthinkable to engage in any service alone that doesn't also have a component that all klal yisrael participates in.
The korbanos tzibbur are for everyone - those who are actively sacrificing and those who have yet to.
Similarly, when we have a tefilas tzibbur, we fulfill the same thing. When we say kedusha or kaddish or anything else that is said only in a quorum - we are of course demonstrating that our unity is significant component of our service - but we are also acting as a tzibbur for all those who may be out there without it.