Honestly, I feel people far overrate edo tensei as a significant powerup due to the unlimited stamina reserve...in my opinion, I would see the edo version of Rikuodo Sennin as an ultimate downgrade, as I am far sure there are particular repercussions other than being poorly controlled by "tactician" Kabuto who managed to have most of the edo akatsuki members wiped out in two moves by the Shinobi alliance, as if nothing could be more disappointing than such a slap to the face... I am rather disappointed such a jutsu was created to be so overwhelmingly OP, perhaps I simply cannot stand the infatuation with it...