And what if I don't want to? What if I like my chosen utilities? Just because they don't fit the fight - that puts me at a disadvantage.
Also, your build is not just for "take less damage, or do more damage." - it affects everything down to your utilities, too. There's the rub - there's a lot of choice in how one plays - but if a specific dungeon/encounter is not conducive to your build - you are borked.
There is no way to make any encounter feel more dynamic with 5 guys - you need to do these things otherwise everything would be a zerg rush and I get that. But that is counter-intuitive to what ANet has been suggesting about how you play your character.
All I'm saying is that yes, you can bring your utilities you like to the fight. But you have to level with me and agree that some utilities are made more for solo or offensive oriented gameplay, and right now, right
now you can't rely entirely on other people to give support buffs and know where to place fields accurately and such, because they don't know how well the game works or the best way to get things to interact.
I've ran several dungeons, and every single time things click, I get a feeling of intense zen that I haven't felt in a long time in MMOs.
Hard ass fights that we figured out by strategy, not by managing the mechanics is how amazing the combat and the systems of the game work together.
The fact that one of the bosses in Ascalonian Catacombs can be stopped by a fucking DOOR is proof enough that the game was built on figuring out strategy against enemies you face, rather than needing a tank and a healer.