they should be willing to "do the work" when called on. if they are the Human Army Development Guy, they should be able to be called upon to provide an opinion, and preferably playtest, any list that falls in their jurisdiction. ditto for the xenos guy. if they're the rules guy, and the rules need a new FAQ or erratta, they should be the ones fixing the PDF. ditto for supplments guy and suppliment changes.
honestly, i'm not sure what head honcho is supposed to do. ask these kind of questions i guess

(ok, he should be the one cracking the whip on the others, and if any of them falls sick or otherwise unavailable, he should be stepping in to whatever gap is there)
they should be open about their decisions and the reasons for making them
they should provide oversight, guidance, advice, and encourage growth and development in their respective areas