The alternative, I would suggest, would be a committee that had more resources of its own and would perhaps, at times, pursue an agenda that is somewhat different from the reports of the Auditor General, which does certainly happen with some of the provincial public accounts committees. Having said that, a lot of my concerns are indeed a bit more theoretical perhaps and aren't necessarily shared by the members of the committee.
I think there is some question of exactly who is in the driver's seat. Is it the Auditor General or is it this committee of the House of Commons? There's always the issue that the Auditor General is ultimately responsible to this committee for her own office and affairs. In theory, the relationship could be one of a conflict of interest.
I agree, in speaking to members, that they feel that these are perhaps theoretical concerns that don't actually arise that much, but I think they are important to keep in mind.