Ugh, don't acknowledge assholes who go with that "q slur" bullshit. They're almost always biphobic and usually pretty TERFy. There's nothing wrong with the word queer to describe the umbrella identity that both bisexual and lesbian women fall under. We're all queer women. If those gatekeeping assholes don't want to join the party, they aren't wanted anyway.
I actually saw the musical and thought Alyssa might be bi or pan pretty easily. Didn't know she was meant to be established as a lesbian.