It is absolutely a deal breaker for me if you cannot hang your arm out. You get in, sit down, test the arm and if the sill is too high you get out, thank the sales guy and go home.
Doors on scenario: Am I going to be able to hang my left arm out the window comfortably, or is the sill too high making me feel like I'm trapped in a steel box?
I'm really not interested to jury-rig something here, and I don't want a hard top that I don't need and don't have room to store. I think it's better just to take a pass for now and wait until Ford fixes this.