1) I'm assuming, because Merlin is not at Gwen's coronation, yet they know Arthur is dead, that Percival arrived at Avalon and Merlin told him what happened and he took the message home? Or are we suppose to believe that Gwen knew Arthur was dead instinctively, like she said she would? I'm assuming Percival was running like heck after Gwaine's death to try to intercept Morgana, so headed toward Merlin and Arthur and not toward Camelot.
2. If Gwen is now ruler of Camelot, and she and Arthur had no children (something I felt was very odd that no one commented on, considering they were married for, like, four years before he died) does that mean that any children she had with a different partner in the future would inherit the throne? I'm trying to work out the line of succession.
3) I would like Merlin to return to Camelot, does that seem reasonable? I know the ending would like us to think that Merlin is still out there watching over Arthur, but I don't see why he couldn't travel back and forth.