We're all DDs now >.>

[Rasylia]

Those things aren't mutually exclusive. Everybody should play their best.

Correct me if i am wrong, but at release, and if played with normal (low) Itemlevel, both, the 4p and 24p content was at least somewhat challenging, right? I've heard stories about for example City of Tears where you weren't able to finish it in 90 minutes.

Now, the more itemlevel people have, the easier the dungeon gets, right?
Less Tanking required -> Tanks should dps more
Less Healing requires -> Heals should dps more
Same Dmg required, but more itemlevel -> Dps players can do the same thing as always - damage.
But, since you have more health, more dmg, and less risks, dps classes don't actually need to do the same stuff as before.
Also, tanks and heals are dps-ing too now, right? No need to concentrate on anything.

Edit:

Point is: If everyone would do the same things they've done at the start, it wouldn't require anyone to actually do something extra.
More itemlevel: More health, more healing, more dmg.
Aka -> Just by increasing itemlevel you allready do more dmg by just tanking and just doing your usual dps stuff.
But, while dps classes tend to not put the same amount of effort into it as at release, tanks and heals are now blamed for not "doing their best".

Yes of course it should be mutual. Reality just tends to differ.