It's still quicker to just wait in the line than to go get a
DAS, wait for the return time, then wait in the fast pass line, for almost all situations in our experience. If you have headphones, can listen to an audio book maybe or watch a video, or whatever works for you, it's probably more peaceful in line than all the hustling back and forth required when using the DAS. I think DAS is best for people who otherwise wouldn't be able to go at all, and have a caregiver that can use DAS to make the experience enjoyable for them.
(We went one afternoon without our special kiddo and were amazed at how much we did and saw. Eye opening.)