In all honesty, Shuuti isn't very interesting at all to me as a rival. As a person, I find him interesting in the sense that he's a photographer (same reason why I liked Todd), but that's about it. I'd also like to know why he thinks so lowly of Satoshi just because he's from Kanto. How did he form those opinions? Why does he view Satoshi as a country bumpkin? It's not like Satoshi acts like one, unlike Goku in Dragon Ball when he first met Bulma.
To me, Shuuti does feel a bit forced. I think it would've been nicer if Satoshi just unintentionally pissed him off in some way and then he vow to get back at him would be better than what's going on now, imo. He seems like a mix of early Shigeru and Shinji or they were trying to.