I personally saw these pairing coming a miles away, and considering it wasn't the focus of the story at all, I think it was well developed enough. Like someone said above, focusing to much on these relationship drama would have ruined the narrative in a way. The only thing which really surprised me are the sudden NSFW elements, it's like the author said "Screw it ! I want to draw some nipple !" It seems pretty random... (Not like I will complain but still).
By the way, please tell me I'm not the one who thought that Doctor Woe was inspired by Doctor Who right ? I mean his coffin is basically a Tardis...