I’m also an Ehmry Bay player, and I see these problems, too. Loading into the arena is a large problem, as it creates a delay and often ends with players dying, as OP said. The bombs on Warden 3 could really use an AoE circle, but I like the challenge of them being an almost insta-death.
With that said, thank you ANet for an exciting and fun Living Story event! While it may have some small issues, it is one of the most enjoyable events I have seen come out of this part of the Living Story.