Sometimes it is nice to be able to go faster to get the height off so as to not to lead to a rushed approach.
A classic example is suddenly being given a left base to 26 at LTN by the helpfull LATCC people, you really do need high speed to get the height off.
(Before I get the usual argument about having to lose the speed when level so there is no advantage to high speed, lets not forget the square rule)