You know that really, pretty much the entire game has been a series of 'side stories' that are marginally still on track, yes?
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As to complex - how complex is complex? This game has more twists than any other game I've DMed with the notable exception of a couple (on another board). They're just... not obvious unless you know what to look for. Simply because certain characters haven't displayed their full... background, doesn't make them shallow; quite the opposite. Retaining an air of mystery is one of the things I like most about this game.
If you want to do something with the guards, please feel free to indulge yourself. I'd be interested in seeing what you have in mind - and how it plays out. Go ahead, knock yourself out
. If you get stuck or need a hand, we're here. I'm sure suggestions could be made.
On that note, I need something for Tod to do (which doesn't involve her revealing her true nature). Hmm.