Board Thread:Naruto Discussions/@comment-25122992-20170428150337/@comment-734582-20170428205506

I don't really see a problem here. Judging by what we know, the edo tensei's power is scaled to that of the summoner. So an Edo Tensei is a weaker imitation of an original, and so if it cast ET it would cast a weaker ET.

I think similar scaling problems would exist with control, IE an ET could not control another ET as efficiently as a living being.