In Classic, two of the many z-ordering features was "Place in front of another object" and "Place behind another object". This feature was extremely useful in games that featured visible upgrades to characters, like body armor or weapons, that could be pinned to a character, while not interfering with the appearances of other characters (for example, maintaining proper depth in top down games, the upgrades not appearing over characters who should be in front of the upgraded character).
Anyway, yeah, I miss that feature. They're the last two actions needed to have a fully featured z-sorting system. Pretty please?