I don't think this is the worst looking hurricane I've ever seen, but it's not a very happy system. The biggest factor against any regeneration is the size of the system. Smaller systems as we know tend to be more fragile, subject to rapid intensification, and also very easily disrupted given moderately negative conditions. The storm just isn't big enough to generate it's own weather really.

Mind you, Adrian will still be a reasonable low pressure when it makes it across central america, and it also appears to be travelling with the upper airflow. Which might be good, or it might encourage a transition to a non tropical cyclone once the storm center gets disrupted by the mountains and land.

Just musing, and remember I know nothing

-Mark