I don't think all the cards you listed should be limited. Because they are the inferior versions of a bunch of more powerful cards. Besides, they are not even banned from TCG/OCG. They are worthy as SR/UR, but definitely not ban/limit type.
OTC < Tribute of the Doomed / Offering of the Doomed
E-Con/Soul Ex < Change of Heart
Double Summon < Ultimate Offering
Champion's Vigilance < Solemn Warning