Looks to me like the large change is where exactly this closes off. The 18z was an absolutely perfect spot for this entire subforum. The 00z not so much. Given that this is global and six days out, this is actually a pretty good spot to be.
Side note - Winds would be pretty significant here, but with no HP to the NW, the wind threat is not quite as high as it could/would be. Still something to watch nonetheless.