Same setup as it was for the original ADSL roll-out, where all phones were filtered at the master socket, and when people come on tweaking their ADSL its the same recommendation usually.
i.e. having an unfiltered star configuration (even if no phones plugged in) can cause reliability issues for ADSL, speed drops for ADSL2+ and cause worse things for VDSL2.
It is all down to the ability of the wiring to pick up interference.
By filtering at the entry point to the property you reduce this effect as much as you can.
Dont like what BT do when installing VDSL2 feel free to change it, but
a) Expect to see possible drops in speed
b) If an engineer visits for a fault and wiring is not to BT spec then good chance of being billed for the call out