What are you talking about - Survivor can be AFK'ed or farmed via killing shiny things. There are valid arguments to change the difficulty of Kilroy's but nothing to do with Survivor.
Your kidding right? It is used for survivor title grinding like crazy with scrolls its something like 44000xp per run, with little effort, right insignia's, vampiric gold knuckles, dagger mastery to as high as possible. Can grind out survior title pretty quickly.
Now they have increased difficulty though not sure if it is still possible.