I've killed Titan a few times, usually as tank. Last night I was on DRG for the first time and I did not have any issues dodging WotL or LS. Two of the videos linked in the OP show the player moving, stopping and moving again then being on the ripples/red area when the cast bar finishes. There is obviously a bad sync between cast bar and animation. I have lagged once in Titan but it was nearer release and I think there was a major problem with the instance servers, rubber banding and jumping. If it is like that for the people suffering then I feel for you.

Does anyone have any recent videos since the last restart/hotfix that can show someone dying when they are out of the AOE before the cast bar finishes?

I do think there is a problem, a lot of people are reporting it. It might help to show some proper recent evidence.