The way I see it we can have two lines of investigation OR we can focus on one line and shut it down. One involves letting both Serah and Wedge live so we can see how these Wedge Reports play out, while we look at our current suspects, and the other is to kill them now and make sure they both aren't scum. I'm in favor of letting this drama play out.

I don't know why Serah did or did not get a report, but I do not think this means we need to immediately kill Wedge. What Serah is right about is that now every morning someone is expected to have a Wedge Report. A few things may happen, but here are three general outlines.
1. Wedge lives. Someone claims a Wedge Report.
2. Wedge dies. Someone claims a Wedge Report
3. Wedge lives. No one claims a Wedge Report.

What we figure out here is that if:
1 is true then Wedge may confirm to whom he gave a Report to. Whether you trust that person is by how much you should trust Wedge. Both could be scum.
2 is true then we get a confirm on his role and we get a Wedge Report. Despite being town, he may have sent his Report to the wrong person.
3 is true then Wedge probably is town and has been roleblocked OR is dirty mafia and is playing this route.

What I do sincerely know is that now we have to get daily reports, then we get a list of names. Whether it be the person investigated or the person receiving, we get a name. I want those names.