Subtropical declaration is quite fitting for this feature considering my own concerns recently posted in this thread. It's interaction with the TUTT have led directly to it evolution in this regard...

The question now becomes, will it complete phase transition and become purely tropical? Timing landfall will be critical in determing that... If it moves quickly toward the Coast and comes onboard than naturally it will only transition into a non-entity. If moves slower than modeled remains seaward for long period of time, than it will be sitting over some of the hottest waters (Gulf Stream) in the Atlantic Basin and a transition will likely occur.