The thread that you linked is more addressing just the shifting issue. I believe my issues with shifting stems with my issue of the clutch not returning and clutch hanging issues. Maybe hydraulic? Idk the dealership I took it to says all they can do is replace the clutch as they can find that is what Ford says and hope for the best with no promises. Not really what I am wanting to hear.
Well it's a new clutch on F's dime, so you should do that. It will preserve your warranty, likely fix your clutch complaint (duration not withstanding), and give you time to ponder it's future. Either way, I'd make Ford give me the new clutch.