Well if I'm reading the NOTAM correctly it is only in force until 2nd May (at 14:00). So is there any WIP that could be the reason for it? Or just a trial until the start of the summer season?
If it's for noise reduction then it's swings and roundabouts. Aircraft getting airborne further from the upwind end of the runway will be maybe 300ft (my guess) higher crossing residential areas. Good! But they will be applying take off power 1000ft closer to any residential areas behind them. Not so good!