A couple of points on this.
The first caveat I would make is that many who send you info on this are going to be the natural whingers who would feel overworked if they were flying one day a week between 9am and 5pm. This is
not to say there are not genuine concerns out there, but you do need to sort the wheat fromthe chaff.
my second thought may point to some "wheat", though I have no personal experience here and that is with Ryanair, you say
Ryanair pilots operate to the 100/900 rule?
. 100/900 rule is good in itself, but it is all the other bits of CAP371 that make it in my view a good, though not perfect, (but a perfect system is probably impossible to achieve) system and I would agree that the new EU regs are what really need looking at.