The trouble is some crews will roll to the end (without prior notice), and some will not. But when they do, that's reason for it. It just happens to be convenient that their gate is at the end of the runway.
It seems backward to me that everyone is doing their best to maximise the use of the runway at a very congested airport, but the A380s want to roll through because their turnaround is so tight.
B744s B773s A330s don't really affect our arrival rate much because during mixed mode the arrival spacing is 5 miles (2mins) anyway, and they almost always use the high speed exits. The flow behind the A380 is 4mins.
It's really not a problem if there are no departures waiting because with a 7/8 mile wake turbulence gap behind there is enough room for it to roll to the end, but certainly not enough for a departure to go.