I have been tracking this day and it appears there ended up being some compromise on this solution. Its not as far west as the GFS was showing originally but the EPS has slowly come around now to the idea of a ULL forming to our NW when before it was showing a broader trough over the PNW. There are elements that even the GFS sniffs out first.
Even with the deeper trough... the GEM is actually not terrible in the middle of that trough. It helps when the they are able to dive southward like this.