Very Little Playable Space!

I dont know where to put this, but my biggest issue since the first time I played GW2 is the playable space of the story instance! especially with this blood of saga thingy. why did you think it's best to give very little of playable space during bangar speech ? i've been kicked twice! for having my feet on the red part of the map, at worse the playable space is at the hill, if you trying to move to adjust the camera issue that happened when you sit on the chair there and you accidentally slipped down, good luck getting back there in less than 6 seconds, I was really excited to play this episode but this experience alone completely ruined me, and there is no checkpoint? so i have to listen all the pointless dialogue again that I have already heard the first time.