Investigate what?

Christianity Today has come out with their own suggestion that SGC undergo a thorough investigation.

[ C.T. has been in business decades.  I am sure they have some sexual allegations from their past.  How were they handled?  Can we have an open and transparent investigation about their past? ]
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Here's my question:

Is the investigation to be about how SGM/SGC handled the reporting of sexual abuses that took place within their congregations? 
 [ They admit they could have done better,  C.T. itself notes that a lot of Christian organizations who faced the same issues in the 80's and 90's also struggled to find their way.]

Or is the investigation to be about if SGM/SGC had an authoritarian, heavy-handed leadership style during the Mahaney years?
[Carl Trueman's mediation organization looked at that issue a few years back.]

Which investigation would you like to see?
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They also noted that Boz's business, G.R.A.C.E., might not be the organization you would call on if past disagreements with organizations that employed them are an indicator.