I will say that desiring parity of DPS across all classes is an unrealistic and frankly boring expectation and archetypes have much more to offer the system than their raw damage potential. Even DPS archetypes in this system do not need to deal the same damage provided the one that is weaker in that aspect provides sufficient support or etcetera in other capacities. Designing with this in mind also enables people to hybridize when design philosophy is not focused on damage.
I will say, the argument that fighters deal more damage than wizards in other roleplaying systems at higher levels is incredibly flawed - the opposite is generally true.
In terms of an actual suggestion, I would like more hybrid abilities. It's possible I do not understand the system enough and what I desire is already possible but, some abilities designed for, for example, melee healers would be nice! Don't limit it to Paladins either, let Shaman and Druid types get in on the fun. Maybe play around with the engaged mechanic, some sort of melee strike that deals limited damage but heals the next person engaged with the enemy for a significant amount when they land a strike, or fun stuff like that. Maybe a healing "cleave" where you hit the boss and it heals a number of other people who are also engaged with him.
Also, let class specific abilities be flavorful, and not necessarily required for certain builds - though there may be a case to be made for them being optimal.