You're taking Truby too literally. You want your main characters to be interesting and one's the audience can feel something for. We are all flawed, none of us is perfect. Can you think of some of your own flaws? What if you introduced one to Tyler?
I'm fairly good with watching what I eat but sometimes that cheesecake calls out and, in a weak moment, I succumb and devour it. Tyler can be aroused to suspicion by any number of close encounters leading up to investigating.
Character personality is ongoing not one time. What I'm going to tell you is the honest truth, I'd scrap what you've written and work forward from your new beginning. The first time you move to a new place, you follow the same path over and over. Then one day you take a slightly different road and find out how it connects to a road you know. Slowly you begin to map out in your mind how to get from point A to point B. One day you have road construction and you know how to detour to get back on the road you need to be on.
At this point, you know your basic story. Trust your instincts and write from your characters' viewpoint. It may take you on a slight detour from your previous routes but you know in your gut how to get where you need to go. That's at the heart of good writing.
In writing, I don't know how many scenes my characters will appear in until it's finished. You have two main (lead) characters -- protagonist and antagonist. You have several supporting characters. You may have incidental characters (day players) and extras (non-speaking). Every time a main or supporting character appears in a scene, they should be doing something that develops the audience's perception of them as a character. If Manning is in six scenes, we are seeing six different situations where he interacts. If he's not integral, then he shouldn't be there. This is a situation where you seriously need to evaluate how many characters are really needed and consolidate if needed. You're not writing scenes for characters. You're writing the story and observing which characters appear in a scene to move the story along. If Manning was that upset, he could rat them out in his second scene.
The story dictates the pacing and scenes, not the characters.
1. The video was never shot, so there's nothing to show, especially since they leave Sheila behind. She's safe now, so is this supposed to shock him? At least in this version. It seems very lame if it's meant as a test. It would have been more meaningful if there had been only Manning and Henderson. Since Manning is masked, I'm not sure how that would be used to blackmail him.
There are no have-to's in writing your story. Some things make for better presentation and engage the audience. Films run the gamut of storytelling. There are multiple ways you could approach the opening that could be equally effective. I know I keep saying it but
Keep it Simple. Simple does not mean boring or less powerful. In great scripts, the powerful scenes are simply/cleanly written.
2. If they're going to find out, why not tell them? What do you hope to gain by withholding the information? Did you read the "
Five Plot Devices that Hurt Your Writing" link I included in my last post?
"Withholding vital details will make me sound more “literary”
This one took me years to get over. A lot of beginning writers abide by this strange belief that confusion is somehow complex, that by purposefully withholding essential information from a story we can make our work sound more “literary” by default. It doesn't work that way. "
3. Don't refer to other films to justify your decisions. That was also in that post. Most writers cite "real life events" whereas you cite other films.
"But it really happened that way
Fiction critiques should never resemble a legal deposition, but if there’s one rebuttal writers will hear in workshops at one point or another, it’s this: “But it really happened that way!” It’s common for writers to borrow from their personal lives, but some confuse this to mean it somehow makes every related detail germane to the story being told, or simply because something actually occurred it lends the event a sort of storytelling immunity card. It doesn’t. "
4. The other you seem to keep struggling with is working with characters.
"It’s my world and my characters can (conveniently) do whatever they want
I think every writer struggles with this one early on. We get to a point in our stories where we hit a snag, and the easy solution is to have our character perform a saving action that's completely divorced from his/her established characterizations, just because doing so will keep the plot moving."
Again, you should re-write your script from the beginning working forward ignoring your prior work. It sounds scary but it's not. It doesn't mean abandoning all of your previous ideas. Let yourself be guided by your story but not rigidly chained to your former scripts. Your new one will be energized, shorter and require no retrofitting.