I'm surprised that the Dovakhiin hasn't been sent to kill Tosh Raka in Akavir. I understand he exists soley to destroy Alduin and that Tosh Raka isn't his destiny, but he IS the dragon killer, and Tosh Raka is one sinister dragon. It would probably take the Dova a little longer than a month to travel to Akavir by a ship similar to the Emperors'. I guess he could ride his domesticated dragon and fly there, he'd probably get there faster.
Anyway, my point is, does anyone else find it strange that the Dova has never heard about Tosh Raka? I think that this would be an epic DLC.