Board Thread:Episode Discussions/@comment-1181222-20160421111843/@comment-734582-20160421210734

Omnibender wrote: They could have shown Edo Tensei being incomplete without making Orochimaru look like a joke. Until the moment it fails, nothing suggests there's something wrong with the technique. If it was shown to have some issue from the beginning, it would have been more palatable. Except that the control is issued by the Kunai, and poor control was what led the Edo Tensei to rebel in the 4th war. Clearly, the most difficult part of Edo Tensei is actually controlling it. I really don't see how this is different from the 4th war cases.

On an unrelated note, it bothered me that Itachi's tomoe were sometimes drawn under a 90 degree angle, suggesting that there should be 4 (it should be 120 degrees)