It's time to just look at the radar or the really short term models. The NAM is probably right, but it's not really the most useful tool right now.
Whatever the WAA was 'supposed' to do means diddly squat now. The radar shows that it's passing us and we're going to have to get some pretty decent redevelopment on the back end to cash in significantly (at least here in DC, you're definitely in a better spot). Our best chance at a bunch more is with the coastal (for which you're also in a better spot).
Most of your posts are looking for details and forecasts that just aren't possible at this point. You're going to have to learn from experience how these things tend to work--which in this case is that these Miller Bs indeed do tend to jump us. Things have not been going our way so far, but this is East Coast winter weather, anything can happen. I remember the second Feb 2010 blizzard came out of absolutely nowhere. If the coastal's precip shield is wider than expected, if the Low stalls farther south and west, etc. etc. Just have to wait and see.