I tend to think that what we see of his personality is not all mind control, but partly just who he is as a person, and so I imagine he would eventually have problems and grow discontent, simply because he would not fit in well with the Envoy's crowd - and so would not receive the validation and sense of importance that he craves.
He's an idealist who wants validation, but I don't think the violence is inherent to him – if he threw his lot in with Shen Wei, he could end up just as wholeheartedly throwing himself at politics. (Depending on how Shen Wei dealt with this earnest youth asking him about how to reform Dixing/how he could best help the Black-Cloaked Envoy. This would depend on Shen Wei's political and social acumen a bit, but if he does anything but tells Zhu Jiu to keep everything as it is, it'll probably end without much disillusionment on Zhu Jiu's part.)