What do you mean, the game gives you no information about Allagan Rot? You read tooltips for Rot and Immunity, you notice it passes to other people, you realize it blows up when the timer reaches zero. How much more information do you need? Takes like 2-3 runs to figure out how it works then maybe another 2-3 runs to figure out how to deal with it. After that it's just about your gameplan and execution.

Doesn't compare to Twintania in the slightest.