On my second watch, I noticed that Angelica has tears in her eyes when she begins "It's Quiet Uptown," and at two other points (third watch), Eliza has rolling tears. That floored me, since, who would notice that from the audience, yet both actors were so totally committed. I had watched a video essay (relating to the film version of Les Miz) all about how actors should not cry when they sing a sad song, but L-MM's choked up verses in "Quiet," as Eliza will not look at him, were really effective.
On the comedy side, I loved the transition of "can we get back to politics?" with Madison