Forget - that sounds pretty simple and universal. Don't 'forget' though, in terms of getting it to 'work', how many crews still check in on Director at LGW and LHR with more than callsign.
Regarding t/off selection - yes - I wish to nominate that. There is no way ATC can tell what suits my a/c and my f/deck on that day. I suppose if we went for a similar RET policy as LGW R26 - ie mediums are expected to take FR - that would be ok, as long as turbulence/windshear/weight/tech issues are taken into account. Much better to have a standard quick 'word' on check-in with director/tower eg 'XXX 1234 for FR'