No, the pilots aren't happy about it. However, not alot will be done about it because there's three types of guys at ryanair:
Pilots who..
1. ..have been there a while (longer than 3 years) and have had enough of the way they're treated. Some may have enough know-how to do something about it, but they need the support of the others..
2. ..are using ryanair as a stepping stone to a larger carrier. They have joined low houred and figured 'i may aswell pay for my tr and get jar25 experience straight away'. These guys have joined for the short term they don't mind what goes on in the company because as bad as it may get they'll only be there for a couple more years.
3. ..have joined because it is a good lifestyle. They've got a family now and want to be home every night. There's a long list of bases to choose from (they're not to know they wont actually get to that base of choice, but even that's not too big of an issue). These pilots would love the 5/4 roster, but nearly all are on 5/3. Now there's a great bargaining chip for MoL.
Pilots 1 would like it changed, but not on their own. Some of the Dublin pilots tried it, with almost zero support, and it didn't work- and how ryanair love to wipe that all over the press, warning off any other attempts ("it cost x amount of euros and they lost")
Pilots 2 don't really mind either way, would be nice if it changed, but not worth getting on the wrong side of managament over
Pilots 3 are quite happy, they'll stay out of it because they've got families to worry about
Now that may be generalising but I think it's pretty accurate. Also I hold nothing against any of these pilots, they all they're (very valid) reasons.
B.Bear