If the LL wait time is reasonable, I think it is fair. It would still be less total time standing in a physical line in most cases.How is that fair and again talk about a waste of time now do that 2-3 maybe 4 times over a course of the day.
Edited to add: If it was a 90 minute line, the initial 45 minutes plus 15 in the LL is 30 minutes less than 90. There is the time waiting for the return time, but that is time when I could do other things and am not stuck in the physical line.