What I always worried about were group dynamics.
What about TFs? The Respec Trial. Large group missions.
THere are usually 2 or more bosses per mob. In the Respec Tf, there are many, MANY bosses. WIth the hp + dmg buffs given to bosses, those will be extremely difficult.
And where's the logic in making a difficulty slider, then upping the general difficulty? The people who want it harder can turn the mission diff up, the people who don't want it harder don't touch the slider.
What's wrong with that?