My bet is that they started not staking them because they were chrome-plating them and there's no good way to do that. Plate before assembly and you crack the chrome doing it, plate after assembly and you wind up plating over a cold joint.

If their glue method works for them and nobody is having them come loose then have at it. I see no reason not to stake a non-chrome key other than covering up the fact that you don't stake a chrome key because it's one of the weaknesses of having a chrome carrier.

Of course, I'm one of those weirdos that's still trying to figure out just what it is that's wrong with my standard (staked, BTW) carrier and bolt with their standard finish, so maybe I'm not the best person to listen to on this.