The plaintiffs also appear to be a group of people who never used FP. So whether it was paper or FP+ I think they'd be equally miserable having to plan. Plus one of their claims is that their kids don't understand going to a ride and having to leave and come back. Collecting a paper FP isn't really different than getting a
DAS return time. If they can't or won't send a runner for DAS, they wouldn't have done it for a paper FP either.
And at DLR, where you get return times at a kiosk, not the ride, most rides don't have FP anyway. Zero FL rides have it, so there is no FP queue, GACs were being let right onto the ride everywhere but Peter Pan (unless they had to wait for the IASW accessible vehicle).
And then there's the difference in how local APs tour. Before FP enforcement started, I pretty much knew that if I decided to go to the park after work, even if I got there around 3pm-4pm I wasn't going to get any FPs, because people would collect them all day to use all at once later at night. Even now, if I get there at 4pm, my FP return might not be until 8pm, and maybe I'm not looking to be in the park quite that late.
Translate that to a local AP who takes their kid to the park as a reward after school. Or maybe the kid is fixated on going to DL, and will have a meltdown at home unless he goes. With the GAC, the family can walk in the park at 4pm and go right on Indy. If they had to use FP, they might not get a return time until 7pm, risking a meltdown (so they claim).
Now personally, I'd probably just go through standby, because even if it's 30 minutes, it's still faster than waiting for the FP return. Likewise I'd probably choose to let my kid meltdown at home (because he wants to go to DL) , rather than in the park (because he doesn't want to wait). And I certainly wouldn't use the threat of a meltdown to blackmail Disney into letting my family get right to the front of the line.
But I do understand that the nature of waiting for a DAS return times, collecting FPs, and planning around time factors are a completely different way than how these families are used to touring the parks. Does that mean that they've been injured to the point of needing monetary compensation? We shall see.