Furthermore, profession design is sketchy at best. In terms of professions that work properly within the design philosophy of trinity-free gameplay, we have the Elementalist, the Necromancer, the Ranger, and possibly the Guardian. Now, this is operating under the assumption that the design philosophy for the game is to adapt one’s playstyle on the fly to cover for your party’s weakspots, so that you play multiple roles in any one build. The Elementalist naturally performs this admirably. Attunement swaps allow him to output significant control, healing, boons, and damage within the same build. Rangers bring some of the best party healing in the game in the form of healing spring, while bringing significant cc through the use of their pet. The problem is that, because of borked pet design, the Ranger’s place in dungeon groups is sketchy at best.
Now why do I say that other professions are not performing within the game’s systems? Simply put, their support options are either too passive or mindless or sub-optimal. Let’s use the Warrior as an example, given that it is the main source of the disease in PvE. More specifically, let’s attempt to perform a popular “non-trinity” warrior with Berserker’s gear, 100b, and shouts. This is a mindless dps build that performs almost entirely passive party support. They press a few shout buttons in a fire and forget support that takes no thought other than basic positioning. They don’t even need to stop dps’ing to do so.
Adaptive and active support options, outside of those held by Elementalists and a few other professions, are simply lacking. Shouts are not interesting, adaptive, or even consciously applied forms of support. Banners, on the other hand, very much can be, as they take into account positioning, micromanagement of banner positions relative to the party, the support skills available to each banner, etc. Unfortunately, Banners do not tend to perform highly, even with recent buffs. It is not necessary, or even optimal, for Warriors to spec support and take Banners in dungeons. It’s entirely possible, and most definitely would be a fun playstyle if the process of picking up items wasn’t such a ridiculously clunky one, but it isn’t an optimal style of play because of poor balance and poor dungeon design.
And then we have combo fields – a feature of play that should work beautifully with the game’s design philosophy, but, unfortunately, tend to be too minor to encourage teamwork. Don’t get me wrong – the Thief spamming Cluster Bomb inside of a water field is doing a LOT for his team’s survivability, but outside of Fire, Water, and Chaos fields, they tend to be lacking as a whole. I often find myself wondering what the point of that poison field is or why I would want to blast finish the smoke field, only for the AoE stealth I applied to be quickly cancelled by everyone involved, resulting in a Revealed debuff for everyone. The problem with Combo Fields is that they are not balanced against each other by any means, on top of most Combo Fields being horribly redundant.
(TL,DR)
I’m probably rambling by this point. What I mean to say is that the lack of a holy trinity has nothing to do with the lack of coordination in dungeons. The problem lies in bad dungeon design, poor balance, and inefficiency of active support options.