Pr Heath Curtis writes about laymen assisting with communion distribution on Gottesdienst Online.
I don't think there can be any argument over the fact that in the minds of those who wrote and originally subscribed to AC XIV it meant that only ordained ministers (whether priest or deacons - the Lutheran understanding of the latter seems rather fluid: see below) would be consecrating and distributing the Lord's Supper to the laity. Never had it been otherwise in the long history of the Church. Indeed, some of the first canons we have from early meetings of bishops deal with who communes whom: and never, ever, is it laity who is distributing the Lord's Supper.
So, anyone reading AC XIV in 1530 would know exactly what it meant: only clergy consecrate and distribute the Lord's Body and Blood. That is the original intent of the article - and I really don't think that this is a point that can be controverted. To try to find wiggle room in there for another practice ("it says administer - not distribute") is to be anachronistic. It's a bit like lawyers trying to argue for new Constitutional "rights" that are beyond the obvious original intent of the US Constitution.
If one does wish to controvert the point: we'll need historical evidence that laity ever distributed the Sacrament before the 16th century or in subsequent Lutheranism in the 16th century. That bit in the Confessions that Fr. Weedon is always so found of pointing out really is a good key to Confessional Hermeneutics: in doctrine and ceremonies nothing has been received on our part contrary to Scripture or the Church Catholic (Epilogue to AC XXVIII). It is simply a historical fact that at the very least, lay distribution of the Supper is a ceremony contrary to the usage of the Church Catholic up to 1530.
Therefore, I find it hard to view this practice as anything other than an abuse - and a widespread one, at that.