Yeah, I'm hoping a romance will push him to possibly leave that part of his past behind, personally. Not big on the Qun myself, but find the horned race to be very cool looking and IB's personality to be awesome sounding so far.
There are some aspects of the Qun I like, and others I don't. Same with the Chantry, the dwarven culture, and even the Dalish. I'm interested in seeing how IB's relationship with the inquisitor unfolds whether it's a romance or not, myself :3
There are some interesting things they can do with his belief system. After all, just because he follows and believes in the Qun, doesn't mean he's going to force it down your throat, nor does it really mean he believes in it as strictly as the most iconic Qunari we've seen. There are more casual believers in all faiths, whether it's in real life or in a fantasy setting. And he's already been described as having a fairly different outlook from most followers of the Qun. I personally won't be bothered if I can't turn him away from the Qun xD
( ps, I'm totally riding the bull
)
EDIT: You know, I think if anything I'd prefer something like they did with Leliana in Origins. Where you can encourage him towards a less strict belief in the Qun, but not pushing him away from it completely. In Origins Leliana doesn't lose her faith if you harden her, but she becomes less fanatical/whimsical in her belief of it.