I love Tick-Tock. It was there for a reason, or a couple of reasons.
Sondheim has said it balances our look at the three "current ladies" in Bobby's life: April (Barcelona), Marta (Another Hundred People), and Kathy (Tick-Tock). Without it, Kathy gets the short end of the stick (as it were).
I also think it adds a physical carnality to the show that is missing if you cut the dance and just have songs and scenes. It's a sexy, strong moment that ends in an artistic "orgasm." I also love that Bobby is in bed with April, but Kathy is the one doing the dance, as if Bobby is thinking of her while he's sleeping with April.
As far as other dancers in the number, I would keep it to a bare (no pun intended) minimum. This is Kathy's moment, not a chorus of Victoria's Secret models. I didn't mind the other dancers in the concert version, because they were kept in the background for the most part. I would have preferred it with Kathy alone, though. We don't need to see the off-stage chorus singers suddenly on stage behind Marta while she sings Another Hundred People. Why should we need to see a group of chorus dancers behind Kathy?
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22