One more:
how much disruption is caused by the 1500 runway swap, and how much when the runway changes from 09 to 27 or vv?
The first part has already been answered. Changing ends, from easterlies to westerlies or vice versa, typically involves a gap of around 8 minutes between the last landing in the original direction and the first in the opposite direction.
Again, if you want to see an example on WebTrak, look at last Saturday evening (12 October) from 17:25 onwards.