While there is no direct mention of eliminating the current cross-classing nerf, it seems likely that it would be abolished in favor of same-class buffs, which are mentioned below.

Players will no longer be bound by level restrictions when setting actions from other classes.
For instance, a level 1 pugilist will be able to set a level 30 gladiator action. However, the effectiveness of that action will be scaled down accordingly.

All traits will be made class-exclusive.
Adjustments will be made so that certain actions will only unleash their full potential when paired with traits belonging to the same class.
They could accomplish the same result either way, but the new system seems to have a goal of reducing complexity. Keeping the cross-class nerf seems unnecessarily complex in the face of the adjustments quoted above.