<<made ATC go for super-tight departures/arrivals and they stuffed it>>
So speaks "cadet pilot" Mr Katana........ Hope you don't "stuff it" one day, my son.
For Curious Pax.... during my time in Heathrow ATC I often heard of crews who "anticipated" the other runway as a kind of alternate.. Extremely unwise as the departure runway is frequently not available for landing, not simply because of departures but there are often works going on which would prevent landings.