Agreed, the impact of the affair would have been lot greater if it had been emotional as well as sexual.
And Justin's desire to take over SP really comes out of the blue (and makes no sense - even if Bill and Liam are in prison, Justin is still just an employee who owns nothing of the company and answers to Bill). Besides, we have had zero indication that Justin has any interest in anything but the legal aspects of the company. What is it that he wishes to DO with this new-found power? Spencer Publications is a publishing/media corporation. Is it really Justin's lifelong dream to, say, start a new magazine or news channel? Have a say in what gets published and what doesn't? Gain control of the media? Do even the writers have any idea what SP actually DOES these days? Sometimes it seems the company is just a generic "big international business empire" and nobody really remembers they are in fact in the publishing business.
Yes, I've noticed this weird pacing problem as well. The storylines manage to be simultaneously repetitive and rushed.
I think the thing is that Bell's "storytelling" moves by quantum leaps rather than a gradual progression. So his idea of a "dramatic" storyline is:
1) Sudden twist that starts a new storyline
2) Stuck in a holding pattern of people either talking about 1) or trying to keep quiet about 1), for several months
3) Sudden quick and unsatisfying resolution of storyline (often simply consisting of someone failing to keep quiet and just blurting out the big bad secret, and everyone else going "oh, okay then" and moving on with their lives).
Sometimes there's not even a lot of drama or twists involved, and then it goes like:
1) THING happens out of the blue.
2) Everybody says "oh, look, THING happened".
3) THING stops happening with no explanation.
4) Nobody ever mentions THING again.
This is, for the most part, how he does "romance".