Quite a complicated forecast and is very fluid and changing. Again, from my experience here, the snow/ice line will be (in my opinion) a bit south of what the NAM and GFS are showing... CAD stronger than modeled. Surprise, surprise! Yes this low ends up moving to the west in a Miller B fashion, but it's so darn weak, so I just can't see WAA being overly strong and I believe it's being over modeled. So couple a stronger CAD and weaker WAA, I'm thinking a bit more snow to the south of 460 than a lot of models are showing. Areas that I have a higher confidence in mixing is Southside VA, as well as the NC Foothills and the NRV. Our most recent snow map shows this well.
The change from ice, to snow, and back to ice is certainly plausible as the low begins to transfer from the TN valley to the coast. The tricky part is figuring out how long the mixing lasts and how far north it gets. (Again, goes back to how strong the WAA is.) Other thing would be to hope for heavier precip rates to overcome the marginal warm nose showing during the transfer. +1C to around +2C warm nose can be overcome if rates are high enough, but as soon as rates fall, you'll see a transition to ice/sleet.
I hope that somewhat answers your question and wasn't too repetitive. Running on very little sleep ....!