I knew about the show hidden but missed the show hidden under render options for years.Nice tips. I especially like t he smoothing modifier tip. I normally will just turn off limits (click the gear icon for a parameter and uncheck limits) so I can move the tongue farther than designed. I don't know where some of the limits in these characters come from. Certainly not from real life.
They hide a lot of professional render options, as for the hidden scaling and translate I can only imagine they are hidden and locked as the require a "adjust rigging to shape" and also can interfere with the corrective morphs