The biggest problem is the number of 24 hour rest periods, which is the worst possible duration - go to sleep on arrival at the hotel and you report to work after a long period (12hrs+) of being awake. Try to stay awake on check in and you're extending a long day even more, which needs longer sleep. We need odd multiples of 12Hrs. It was in JAROps to avoid multiples of 24hr rest for that very reason. It would be difficult to schedule anything else at outstations where there is one flight per day. That it is the norm at home base is disappointing.
Aluminum,
That is indeed the biggest fatigue issue i experience regularly.
24 hrs rest changing sleeping pattern on a continuous basis is way more tiring than minimum rest in a same day/night pattern.
It also increases chances of cancer apparently...i recall reading it on BBC.