I haven't even seen this last episode (pt 2,that is)yet, I don't have BBC America so I will have to run down an online stream of it later; but from reading the tons of spoilers I tend to agree with you. I don't know, maybe it's partly because there have just been so many awful, wrenching TRAGEDIES lately in rl, and even if this episode's ending might make better creative or mythical sense as is, that hurt, grieving part of my heart would just like a miraculous, re-set button sort of ending just so Merlin and Arthur can be together in THAT time and place instead of waiting for the 'future' part of 'once and future king' to come to fruition. It just can never be the same again, and I guess that's what makes me sad, that sense of loss and the fleeting, ephemeral nature of time spent with those precious to you. I guess I just wish Merlin didn't have to pace through Time waiting for Aurthur to reappear, even if that falls more into line with proper canon. I might change my tune later, once the holidays are done and 'normal' daily life and routine is back in effect, subduing much of my current emo state; but some part of me is always gonna be so so sad that it ended this way as far as this particular tv series.