I'm thinking the only aspect I've got planned that would change things is the introduction of the Love Interest. At the beginning the MC is reasonably content with the arranged marriage, not specifically looking forward to it, and not dreading it either. (They've met and got along reasonably well, which is what the MC was hoping for.) Except I'm not sure that this will really change things all that much, as it would be perfectly acceptable to all involved for my MC to follow through with the arranged marriage and have his lover on the side.

Must ponder this one, what I'm hoping is that something will reveal itself to me by the appropriate time.