I went to the show last night and had a blast, but yes, the acoustics were terrible. I wore earplugs to block the bass and could at times not hear Al very clearly at all, with or without earplugs.

Re: the songs, it was on the Kennedy Center listing when you bought the tickets:

https://www.kennedy-center.org/whats-on/explore-by-genre/comedy/2022-2023/weird-al-yankovic/

As before, rather than focusing on the hits from his career, the show will feature Yankovic’s non-parody material – the somewhat more obscure pastiches and original songs that have largely escaped the pop culture radar but are adored by his long-time fans.