It goes with ranged build metas. Instead of shut-down/degen it is about frequency of your DPS. It's not a negative, even though it sounds that way. It's just how things appear to be running, at least from my perspective. This does not mean you abandon other areas but it's more like mixing them into the pot.
It's actually quite a fun type of play-style. It is fast paced and very fireworks. The way to re-balance it to either up defense or nerf the ranged offense. Then you will have melee running through and making it in time to disrupt the ranged attackers. The same with conditions. When you have high frequency DPS, conditions can be a nice added degen. If they are effective... But when you weigh even an average condition character against another who can do high frequency DPS? You'll take the DPS. You can't abandon other lines though even if they are not effective damage wise or you become to 1D. Except in PvP where you can run gimmicks being 1D if the game balance is kind of messed up. In WvW though, you need to bring disruptive characters so that you can roll over the 1D. It's just a careful process and what is required for you to run above the meta, not with it. Right now, I would guess thieves and warriors as compatriots. But I would have to hear more feedback from those who played those classes.
FYI, quantity > quality refers to the casting, not player count. My terminology is often ambiguous so my bad if that was the understanding.