The train service has been cut back over the years despite soaring numbers. When first opened there was a standard service of 9 trains an hour in each direction, this became 7 with the removel of 2 slow trains each hour that now start from St Albans. Now East Midland don’t stop during the peak.
Also noticed that the weekend service was halved when I used it due to operational issues with the so called improved timetable. At least Luton has an overnight service unlike most other London Airports.