Well mister food and drink lover, maybe said new player might appreciate not spending the whole boss fight dead on the floor? I mean hey how hard is it to say watch for Mortal Gaze and turn your back , and switch to the other colour of floor when you see its divided into two colours? Easy peasy.
Or as another example the yeti in snowcloak. Don't attack the spriggans, do attack the yeti and the haplit?

Information avoids needless wipes or overly long fights.

Just sayin'...