The final word of a verse may carry its decisive point: divine power in one setting, knowledge in another, or human accountability in a third. Substituting a word merely for sound could weaken the relation on which the argument depends.
For that reason, lack of identical endings in adjacent verses should not be called a defect. If one verse supplies a reason and another a warning, their different closings may make each function clearer.
Worked interpretive test: when an ending names “khabīr,” ask how full awareness relates to the passage; when it names “ḥakīm,” ask how wisdom relates. Where both occur together, consider the combined import.