Why was this functionality removed in the first place? It didn't take long for it to be needed to be restored, mistakes happen and everything appears to have ended well. But that leaves the question of why was it taken out at all? Wasn't it obvious that it was a needed debugging tool and that its security implications were well understood and controlled correctly?
Was it just a part of this seeming craze to 'defeature' everything? Remember the second half of that old addage is as important as the first. Make things as simple as possible, but no simpler.