Just following on from FougaMagister comments on landing clearances at CDG -
I was a bit skeptical the first times I was given a landing clearance while there was other traffic ahead, not yet even on the ground.
However, now after some experience with this way of doing things, I would say I prefer it.
It takes away the will he/won't she issue a (late) landing clearance worry. It focuses some attention on what is happening on the runway, and it transfers the landing decision to me. And I think I am probably in a better position to make that decision from where I sit to where the controller sits.
I would be happy if this way of issuing landing clearances were more widely adopted.