According to the wiki it is broken, which I've basically confirmed with my testing because it don't appear to be working. The thing is, I need to reset a quest for my new version because it has a lot of aliases in it that weren't before. So short of using the console, how can I reset a quest so my new aliases fill? I have a management quest that fires Event OnInit and does my stuff, so I have somewhere I can use it.

If the quest is not flagged as "Run Once" then in your maintenance updater quest you could run a script to stop and start the quest you want to reset.

If the quest is "Run Once" then in that updater quest you'd need to instead force-fill the new aliases in the other quest with NewAlias.ForceRefIfEmpty(ObjectRef).