Naming the Bosses (Champion, Legendary,...)
I like this idea! I think it would add some fun and variety to the everyday romp through dungeons or treks across the open world in a non-intrusive manner. There’s no real loss in changing their names due to the portrait symbols (and theoretically they could still be Legendary Bob the Building Breaker or what have you).
I think one of the most exciting thing about games like GW and EQ was the immersion of seeing an NPC named something more interesting than ‘Champion Zombie’ or whatever. I know it seems minor, but it really adds a sense of awe when you think about why that mob has their title like “Rothusk The Lifeclaimer”, etc.