The issue is how the models are handling that initial piece of energy to hit the coastline, which is the energy that spawns that “eastern low”
The models have continuously trended towards this being more meridionally oriented, and thus more closely involved with the main s/w energy, with the GFS leading the way to this point in that regard
There won’t be an “eastern low” or a “western low”, at least for any extended time there’s going to be one low, and the question is how well the big chunk of energy can rein in that front running stuff