Two tests, even three of a good Biblical Theology

This is going to be a quick note about the task of Biblical Theology.  We have come a long way since the days of G. Vos.  Today, there are so many options out there that even scholars in the field have a hard time keeping up with all the options and the nuances.  I have appreciated Peter Gentry and Steve Wellum's tome which provides a great overview of the field. However, I worry sometimes the big picture is lost among all the voices that are trying to define themselves in contradistinction to one another.  In addition to a foundation in the inerrancy of Scripture, a solid BT will have as purpose the task of missions.  So an important test of a good BT is, is this writer articulating the task of world missions in a compelling way so I am challenged accordingly? (See Greg Beale's Temple study).  But this by itself is not going to be enough.  A balanced BT will also need to be Cross-centered through and through.  So any BT that undermines the ideas of the wrath of God satisfied at the Cross, the holiness of God, and the offense of our sins will end up overemphasizing notions of victory (as NT Wright has done, in the footsteps of Gustav Aulen), human obedience (with the denying of imputed righteousness), and will tend to define the love of God apart from its backdrop of judgement.  If a BT upholds these fundamental conceptions of missions and the cross (see Rev 5) along with the inerrancy of Scripture, then the other things naturally fall into place, even if there are disagreements on second order matters such as baptism or church governance.