For his New York re-entry, Mr. Lang chose Beethoven’s Piano Concerto No. 2 — not a far cry from the Mozart of his comeback concert at Tanglewood in 2018, and certainly less of a vehicle for his theatrical style than the Romantic war horses that made him famous. Indeed, the piece’s comparatively modest Classicism defies showiness, with demands that are more intellectual than athletic.

Which is why Mr. Lang’s hammy habits felt so out of place as they crept into a performance that otherwise had moments of exquisite restraint. During the fleet-footed first movement, he ended a gentle upward scale with a flick of the wrist; after another run, his hands took flight off the keyboard. His arms raised high, he had the look of a soloist conducting from the piano, sometimes in conflict with the stately, controlled orchestral accompaniment led by Jaap van Zweden.

These gestures often felt more like effects than insights — and occasionally entered the realm of dubious interpretation, artificially heightening the music’s vigor. Mr. Lang’s interventions were most apt in the second movement, which he played like a richly expressive aria. He has never been skilled at pedalwork; but here, in one of the movement’s final solos, his softened and sustained voicing lent a fuzziness to the melody, like the memory of a song from childhood.

As if to overstate his recovery, though, Mr. Lang blazed through the Rondo finale, deflating its buoyancy in a breathless dash. I wonder how much of the speed — fast enough, at times, to muddle the melody — was the doing of Mr. van Zweden, who showed no signs of slowing in the hellfire reading of Beethoven’s Fifth Symphony that followed.

Mr. van Zweden’s inexhaustible intensity — crisply delivered by the Philharmonic players, much more so than in their 2018 recording of the symphony with him — had an edge-of-your-seat excitement that dimmed with each movement. With the baseline already at boiling from the start, where else can you go? He did push even further, in the finale, but he ended up pitching his baton into the viola section.

New York Philharmonic

Performed Oct. 7 at David Geffen Hall, Manhattan; nyphil.org.