Matt,
Both the "Plan Only" and "2D/3D" work modes (which are essentially the same) no longer exist in Bentley Architecture V8i. This is why the "Update Master Model" option, the key to these modes, is no longer present in the Drawing Extraction Manager dialog`s Output tab.
The intent is to replace these modes with the new Drawing View functionality, since they serve the same basic purpose of providing real time updates to a resymbolized view. Note that there is a "Sync Drawing View to Drawing Def" icon in the main Drawing Extraction Manager dialog; the right-most tool from the group of icons on the left half, that will generate a new Drawing View definition from an existing Drawing Extraction definition. That way you at least do not lose your general settings.