Taxi routes and speed control
As stated before all, ATC's hands are tied with regard to taxi routes, applying common sense and giving shortened routes at times of low workload/risk simply isn't allowed for inbounds. If you're unhappy about it then complain to the airport authority, they are the only one's who can authorise the change.
Fatbus, hopefully a radar bod will come on to answer properly, but the earlier post refers to crews not flying the instructed 160 to 4 dme, some do not start to reduce to 160 for a few miles and some reduce reduce from 160 to VREF well before 4 DME destroying the sequence creating losses of wake and getting radar controllers suspended!
Cheers,
YS