I'd say that article pretty much sums it up; use dodge wisely and you'll do well. I wouldn't say it's as necessary for PvE (to start with at least, probably more useful at a higher level with stronger enemies), however it's an extremely useful manoeuvre in PvP.
It is so important, everybody who plays GW2 should watch the entirety of this video first [video=youtube;cIx1NCvb5TU]http://www.youtube.com/watch?v=cIx1NCvb5TU[/video]
I think it really depends on the player personally I hardly use dodge roll in most games the only time I do use is if I can't block fast enough.
Depends on the game. In WoW, a tank HAD to have dodge. In ESO, dodging attacks will be completely in your hands and not probability.
Dodge is pretty important to me, it's the best way to avoid damage. I rarely like to block because blocking hinders maneuvreability.
That is true, but blocking is still a great tool if used right sometimes you just don't have enough time to roll out of the way plus if you block in time you take less damage!
Avoiding damage, even if the damage is minimal, is always better than tanking in my opinion. Sure, you only take little damage with high stats on defense which allows you to tank, but that little HP that was taken from you can make all the difference in PVP, especially for PVP matches with time limit where if no players dies within the time limit then the player with the most HP wins.