The accepted answer of this SE questions states that "The meta-analytic evidence seems to favor the [constructionist] view [over the basic emotion view], but there's still a buttload of work to be done on this end."
Hower, an important view in the research on emotion, the appraisal theory, was not discussed in the answer.
Which of the appraisal theory of emotions or the construction theory of emotions tends to be proved the most correct?
Research has proved that the emotion regulation technique of re-appraisal is very efficient. This highlights the accuracy of the appraisal theory.
Research has proved that observing and acknowledging one’s emotional or affective state is efficient for emotional regulation. This highlights the accuracy of the constructionist theory (because its points that it is the affective state per se, and its appraisal, which could have an influence on the experience of the emotion).
Thus, research on emotion regulation may point to a unification of appraisal and constructionist theories. But I don’t think both theories are supposed to be unified.