Delta Tango - Dance to your own music is about right. Each operator has its own SOP and you will be expected, nay obliged, to comply. Mind you, it can get quite confusing when you are giving third party sim time to crews from other operators.
In the meantime, I wouldn't worry too much - if you are operating in a single-crew environment, who is there to brief anyway? I was talking to some of the FEs at Bournemouth the other week who were complaining about the time wasted on IRTs with unnecessary and lengthy departure and approach briefs.