فَلِكَوْنِ ذِكْرِهِ أَهَمَّ
Because mentioning it is more important.
Saying that the subject is important does not yet explain why its mention takes priority. Perhaps it is the normal starting point, perhaps it makes the hearer await the predicate, or perhaps the speaker wants to honor the subject.
Consequently the same surface order can serve different rhetorical goals. Fronting alone neither guarantees restriction (qaṣr) nor proves that the subject is being praised.