The queue scenery isn't all that special that it'd be worth waiting in line specifically to see.
But there are two jobs in Datapad that require you to go through the standby queue.
Yes you can get a DAS for all of the rides that have ILL. It’s just not available as an advance pre arrival das booking. The only exception is when a ride is using VQ, when that happens you have to have a VQ boarding group and then you show your DAS once your return time has been called and you get sent down the LL line.