Jigen, as well as all the new characters, sucks hard in comparison to the Naruto characters. I mean the newly introduced characters after the movie arc, not the children. And since you mentioned designs, only Kashin Koji looks like a character from Narutoverse. All of Kara doesn't look like Naruto characters and their personalities are pretty messed up.
We don't know much about Jigen yet, but as it stands his chances of becoming a badass villain like Nagato and Madara are less than 1%. It will be interesting though what his, and Kara's as a whole, motives are, there's still hope that Boruto's going to be successful manga, but the monthly release is killing all the hype. Next chapter will come out on 7th July, which is more than a month away. Having to wait that long just to read 40 pages isn't worth it, it's been exactly 2 years since the manga started and we're still in the middle of nowhere. This shizz seriously needs to become a weekly manga.