Wave, what used to require them getting your OK, is now not required and in fact hidden inside the mass of paperwork you get to push. "Here, sign this". Under current 117, if you take longer to fly the same, you get paid the same, but you just ate up FDP for less pay per FDP hr/minute, ate up potential FDP at a later time, and may prevent yourself from being legal at a later date to pick up more trips for more pay.
The perfect storm for pilots will be the normal summer Tstorms, causing diverts, causing reroutes, on a very minor scale and easily handled by the few in scheduling, you will be extended, you will be sodomized, and at the end of the day most likely have flown the same time, taken longer FDP, and made the same money. But, you lost a future opportunity because you have less FDP to use. Example, sit in LAS for three hours waiting out Tstorms in DEN. No reroute, no divert, no more pay, but you used 3FDP hours for free. Unless of course you hit rigs.