Some recent articles have suggested that ESO leans more towards party roles like WoW. Where you have tanks/healers/dps roles. I don't think that is such a bad thing. In fact in WoW it gave me incentive to play in groups with my friends and others because I filled a needed role. I found in Guildwars 2 I couldn't identify as well as a tank or or healer which in turned convoluted how I wanted to build a character.
Do you prefer well defined group roles, no roles or somewhere between. How should Zenimax dungeon group dynamics be set up?