As long as Anet keeps “game changing” traits in “mandatory” trait lines. By this, I mean specific traits are mandatory to be able to survive. I don’t like to use metabattle as a reference but take a peek at it and you’ll see every class for every “meta-viable” build has a mandatory trait line.
Ele – Water
Mesmer – Inspiration
Guardian – Valor
Engineer – Alchemy
Necro – Soul Reaping
Ranger – Nature Magic
Warrior – Defense
Thief – Deadly Arts/Trickery
These Trait lines have become mandatory to at least survive. Eles shouldn’t think that Water is for healing and for cleanse. Same for Defense for Warriors. Anet needs to add more sustain and cleanse traits on other trait lines and fix the core mechanics of these classes. Of course, there will be nerfs to these current meta traits to balance it out.
For something more detailed, I won’t be listing all classes as it has already become a long wall of text but here’s some examples:
• Ele – Lowest base HP and Armor? Oh well let’s give them a lot of healing and access to defensive boons. Well, too bad for you they’re only in Water, Earth, and Arcana. Oh, Tempest doesn’t take advantage of attunement swapping? Well there’s still Earth and Water.
• Warrior – So… your defensive utilities have long CD? Go get Defense for sustain and cleanse for a start so you have something while they’re on cooldown.
• Necro – So you have 2 HP bars. What, that’s not enough? Well, there’s Soul Reaping to boost your core mechanic.
Now imagine if this was the case.
• Ele – Elemental Attunement and Healing Ripple are now core mechanics. Elemental attunement and Healing Ripple will only affect the caster and HR heal is reduced by 50%. Traiting to water will increase Healing Ripple by 50% and now heals allies. Traiting to Arcana will now share Elemental Attunement’s boons. New sustain and cleanse traits with different mechanics are added to offensive Trait lines. Some water traits are changed to more offensive ones.
• Warrior – Adrenal Health and Cleansing Ire are now core mechanics. Nerf Adrenal Health healing by 50%. Cleansing Ire does not increase adrenaline when hit. Traiting Defense will increase Adrenal Health’s healing by 50% and Cleansing Ire increases adrenaline when hit. New sustain, cleanse, and adrenaline related traits with different mechanics are added to offensive Trait lines. Some Defense traits are changed into offensive ones with an active mechanic.
On the other hand, they can just add similar traits on offensive lines with different mechanics. Powercreep should be nerfed though.
There are a lot of other changes they can do besides what I suggested but this will not be enough if they don’t balance other skills and utilities. If these are added to the core mechanics, Elementalists will now look at Fire to increase their burn damage and Air for direct damage. Warriors can now boost the potential of other weapons. With this kind of changes, people will start looking at other traits and will finally create build diversity.
TL;DR – Give offensive traits better sustain and cleanse and/or rework class mechanics. It’s been 3 years and these mandatory trait lines have almost never changed.