Just to clear up (again).
The instanced "non permadeath" mode, is going to be there so that IF you are tired of Epic, and just want to jump in and kill something, you can. Some players might be disinterested in Epic, have little time to spend, while others just want a break from it. Battle/Siege-like gamemodes are fundamentally different from Epic, in that they do scratch that quick adrenaline itch in a short time.
At the same time, it is another arena to meet and fight players that in Epic might be far away, or even on another server. Connecting the gamemodes together in a meaningful way, while at the same time keeping insta-battles lighter and less serious than Epic, will be a goal.
We are also planning to develop Battle/Siege gamemodes further to make it more interesting/better too! Playtesting will reveal what will float and what will sink. Expect experiments with priority players, movable spawns, custom-quality maps etc. It's a real challenge to create an idiot-proof, balanced and fun gamemode that creates varied battles.