While all these thoughts are cool.. You yourself have disproved this theory.
You quoted Sanderson saying that Tien was a Lightweaver. Well, if you actually read the books you can see that EVERY time someone physically interacts with Shallan's Lightweaving, it "fuzzes". So, I have a hard time imagining Tien Lightweaving his corpse and Kaladin holding it for HOURS without Kaladin noticing the very distinct "fuzz" when physically breaching the illusion. Sanderson ALWAYS references the "fuzzing" when someone interacts with the illusion, even if it's Shallan herself.
I like your thinkin though. Keep at it, slugger.