I strongly suspect that this is (in part at least) outfall from the 'requirement' to fly CDAs. All these speeds are much easier to achieve if you don't try to achieve a CDA. Too much criticism of pilots will lead to their reverting to the old dive-and-drive style of approach, and whilst your speed control will work perfectly, the noise lobby will get uptight about it.
The last four approaches I have flown into LTMA airports all required use of speedbrake below 4000ft, and whilst flap was extended. The old adage goes: 'the speedbrake is there for my mistakes, not yours!'.
Controllers need to give us more room to manoeuvre, configure, and slow down.