newcomer -
Top marks to you for considering those passenger's ears! The reason a controller can't give you a glideslope intercept from over 25 miles out is that a localiser is only legally promulgated to 25nm, and the glideslope to 10nm. Outwith this you are subject to ATC's MSAs within certain ranges or the minimum radar descent altitude printed on your Radar Vectoring Area plate.
I still use QSY, which has been forbidden for years, in favour of the more correct "request frequency change to...." I've yet to be chastised for it!
You are unlikely to stuff a controller's pattern in an F406. Their speed flexibility is legendary.