Seriously though, I'm curious about the implications of your interpretation of things, especially as pertains to the OP question.
You're insisting it's
not actually Tyler, inasmuch as the physical superstructure and brain were physically Voq's. (How a Klingon brain could pass for human in scans while the other organs had to be transplanted is a question we'll leave for another day.)
But it's
also not Voq, inasmuch as his consciousness was (apparently) expunged by L'rell. We were told that some memories remain accessible, but it seems they're just in the form of raw data, without any sense of awareness.
So who or what
is the being that remains? It's got constituent parts from multiple beings, the brain and memories of one, the skin, organs, and consciousness of another. How do you determine an identity for this being, much less hold it legally accountable for anything?
Addendum: you keep using the phrase "magical soul transfer." That seems like a pointless rhetorical flourish. The show hasn't suggested any such thing; it's framed the entire process in entirely scientific terms (albeit extremely implausible ones). No magic was ever said to be involved (not even the "Vulcan mysticism" kind), and AFAIK no such thing as a soul even exists in the Trekverse (never mind the real one). How this composite being could be created by Klingon medical technology is indeed a strain on credulity, but no more than a lot of other aspects of the show (like, say, the entire Mirror Universe). Why draw the line about what you'll swallow at
this in particular?