IMO, SPC is smart to not highlight at D3 for this area. A subtle shift of 50 miles in the track is a big deal for downstream impacts. For the next couple of days, I would argue it's worthwhile to look upstream at these items:
1.) Location of flooding and heavy rain versus the forecast placement.
2.) Location of severe weather, tornadic activity in particular, versus the forecast placement.
3.) Overall expanse of the warm sector and whether it's dirty or big breaks in the clouds.
4.) Speed of the system.