If you really want to get into these sort of arguments, I would have no reason to specifically keep pushing Shadoweh right now unless I actually thought she was scum. Scum agenda would be to open up other options instead of digging a hole.
Could easily be doing it for various reasons, including focusing on Shadoweh will allow you to avoid giving detailed reads on SB/Prims/Polaris who are much more likely to be scum (I'm more interested in these reads, although you're welcome to continue this Shadoweh thing if you're absolutely sure that's the way to go), for the "why would I do this as town" aspect, because you think you have a good angle to ~*open up an option*~ with the Shadoweh lynch, etc. My main issue with your case (as for what feels fake about it) is that it holds fine if you're evaluating it purely objectively from say, a person who is given three statements and asked to make a conclusion from them, but I don't think it fits in the overall narrative.
Also, I just read your case over again in case I was missing something and now I'm just more confused. What's the scum benefit in wavering on BBM's claim but not putting forward a viable alternative (I don't think she ever voiced support of the Polaris lynch). As for the BBM wagon being already defined by the time people took notice of it and people generally ignoring BBM, that applies to practically everyone here except Dan and maybe Polaris. Yeah, BBM dropping Shadoweh is ~*funky*~, but so are his interactions with you, Prims, Polly, SB, etc. The "rolespeccing too hard" angle doesn't make any sense no matter how many times I read over it. "Strongman makes no sense in this setup yet there probably was a strongman." So scum!Shadoweh thought it would be a good idea to hint town on what her scumteam's powers were? And if Shadoweh!scum knew of a mafia strongman as this theory goes, then what's the point of the doc protect wifom (which looked hella sketchy to me even though i knew it's something shadoweh would do as town >_>). Explain what this means: "It doesn't make sense that she'd read the situation like this unless she knew Rou wouldn't be a big factor."
Fine, let's talk about the N2 kills. Why were Serela and Raikaria killed instead of everyone else? Threat level? Correct reads?
PX is PR hunting? Or because there were no other options? Anyway, look at the games with Shadoweh!scum in them (I guess I'll go over them in a bit); she usually targets or pushes for people who are threats to her or otherwise strong town leaders. Serela kill can be explained away as a pr kill I guess but again, why Raikaria over BT or Prims? Regardless of the implications for BT/Prims, I'm pretty sure any team with Shadoweh on it wouldn't have gone for the Raikaria kill over someone else. This is admittedly based on ~*nightkill meta*~ but it's only a small pebble from the big bunch of rocks of Why Shadoweh is Town that I think you're ignoring.
I'll continue this when I have more time, gtg/