EASA administrators are heavily lobbied by the financial gnomes
RAT
Your 20 years behind the times again. I had quiet a bit to do with EASA FTL / lobbying etc and I never took my bean counter with me - he was too busy with "smoke and mirrors"
I can't talk for other UK AOC's but apart from the ERRP highlighted above (their is no fatigue when $$ is mentioned) min rest away from base, and the changes to factorisation on 2 crew ETOPS flying (which I hope even you'll agree RAT was 20 years out of date although i do know you'd bring back FE's given the chance...) I've seen no real impact.
The worst impact seems to be the FDP available for early starts (I know your going to hate this under EU FTL that was in place for some time) and no limits on the numbers of early duties which unless you work for Easyjet is a real shock and #sympathy