I have rebuilt a couple of rear ends because of grenaded G80 components, really not to many considering how many trucks have it in the last 10-15yrs. Other types of failures are far more common. Consider that the same system is offered all the way up to 1ton dullies.
It can be disconcerting how abruptly it engages somtimes. I would recommend going light on the throttle until it locks and then staying on power to keep it locked.
There are a couple things that could be be tried if you are willing to experiment on your own. Adding a friction modifier to the rear diff lube could smooth the engagement possibly, if the clutch plates are compatible (no idea). Also lowering the engagement speed could be beneficial, this could be done either by installing a lighter spring (it's already very light), or installing heavier flywheights (possibly adding some solder to increase weight).
I have not tried any of this, and do not know If It has been tried, so you would be on your own. I take no responsibility if you break something.