Here's my two cents on this. The GFS (Fv3 version) last year showed a good amount of skill in depicting the intensity of systems, especially in environments where shear was a concern. The fact that this whole time it has had an extremely sloppy, messy system that stays close to land and struggles to develop is very telling IMO. I'm leaning towards the idea of just a broad low pressure that never tightens up and brings a lot of showers and storms to the Gulf Coast vs a further south and tightly wrapped storm that bombs out like the Euro/ICON are showing.