User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-2405:205:118C:74F6:7DFF:974C:AC29:922E-20180425050623/@comment-26285797-20180425202912

It would not happen because the whole point of the Illegal Move Trident, CxC, and DxD are to be Issei's alternative to the Juggernaut Drive. For him to use JD would be to abandon all of hard work and training he put into finding an alternative to the JD, so again, it would be very backwards and render almost all of what Issei went through null and void. A similar situation would be Sairaorg and the King piece. Using the King piece defeats the purpose of the hellish training he put himself through. I understand what you are talking, but it would not happen. Also, as for EJOD, that is a form exclusive to Vali, one that he awoke when he sealed the past possessors of Divine Dividing away, so it would be impossible to Issei to obtain such a form.