Role actions honestly feel like a feature that had a good premise, but it turned out to be an extremely bland aspect of the jobs.

What I think it would be good, it is a comeback of the cross class system, in a way similar to FF Tactics, where you can specialize in niche roles.

Like... For example, you'd be able to equip one whole "set" of skills and a couple of traits, by choosing from any class you'd have at level 30. The idea would be not to influence with your main role... (A MNK picking the LNC set wouldn't be as benefical to it as going for a CNJ set for example) but to give you utility options for situational cases, or even to make soloing more interesting.

The few really vital Role Actions we have now, like Protect, could just be baked in the basic job's actions.