conlangs1-3  Exercise 2: Schematic or Naturalistic?
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  (a) One verb ending for all verbs in the present tense
        Schematic. It comes from a regular system. It helps with producing
        the language, because there are no forms to memorise.

  (b) The Latin-derived word shared by French, Spanish and Italian for "house"
        Naturalistic. It takes a word that natural languages already share.
        It helps with understanding, because a speaker of those languages
        recognises it at sight.

  (c) A prefix that reverses the meaning of any word
        Schematic. It is a rule of the system. It helps with producing,
        because one prefix doubles the vocabulary you can build.

  (d) Spelling changed to match the pronunciation
        Schematic. The designer imposes a rule. It helps with both: reading
        aloud is easy, and spelling what you hear is easy.

The pattern: schematic choices usually help production, naturalistic choices
usually help recognition. Real languages mix both.