You should defintly be able to grab decent seats for WWRY. The line is defintly not as long, plus, if you need to there are plenty of other discounted stores all over the sqaure.
I bought the tickets for WWRY through TKTS, and though we didn't have great seats, they were not bad at all.
If you like Queen music, you'll love it. I promise. Plus, there's tons of funny jokes throughout the show.
"Every exit is just an entrance to somewhere else."