User blog comment:B214/Volume 22 spoilers/@comment-95.90.227.198-20170204105622/@comment-31137559-20170205012646

You have to consider that Issei plans to compete in the professional Rating Games and having him just being stronger than devils and everybody else that's not a god immediately would be pointless. Everyone acts like Issei just became more powerful than everyone else just because his body was remade from Great Red's flesh and Ophis' power. While he is basically a humanoid dragon and kind of a mini True Dragon, he just didn't get uber powerful. If he got so powerful from that, he should have curb-stomped Cao Cao, but he didn't. He should have easily defeated Grendel, but he didn't. And with DxD, he is most likely between Ultimate-class Devil and Satan-class devil. He's not going to become the most powerful character in the series immediately. There would be nothing he would have to push past. There are still people like Vali, Sairaorg, Cao Cao, Dulio, Tobio, Diehauser Belial, etc. We would be missing out on such great fights if Issei is just able to curbstomp them without any problem and the story would become bland because it's going to be one of those "no one is supposed to be stronger than the MC!" kind of story. And plus he has already been given a huge power up that brought him to Heavenly Dragon level by borrowing Ophis' power and that had to be nerfed because Issei couldn't handle it. I think people are overestimating the power he got from his body being remade. While he has the potential to become very powerful. It's not going to just happen in a month. And as far as I'm concerned, Issei and Vali are equal. Issei has the power of Infinity and Dream and Vali has his immense demonic powers. Before you say there's a limit, demonic powers is based off of imagination and the possibilities are endless with the more demonic powers you have. How do you think Sirzechs created his True Form?