Who cares who the 5/4 benefits, could be the devil himself I will take it any day. No through the night flying, No start before 0525 and not a finish after 2400 I have seen in my base recently. With 5/4 and leave included you work less than half the year. I think it worked it out one year as 176 working days in the year or something like that. Month off not perfect but got June this year - well happy with that. Yes plenty 4 sector days but this week flew only one 4 sector day.
Cant speak for TUI but advise from co-pilot I flew with recently who returned from Jet2 was that "its a Capts airline". FO's treated better in Ryanair cockpits and only join as a DEC.
Ryanair is marmite. Most people who join will know within 6 months if its for them or not.
Echo comments about fuel, apu usage etc
I would welcome a change in attitude in management however Im not sure that revolution is coming anytime soon - even with BALPA.