Come on any JFK employees here? I am almost positive this 744 had to return to JFK after departure. The Captain was really on the engines too. Also had his landing coming out very late in the final.
It was probably a visual approach - it's a nice day today and some airline pilots do ask for visual approaches to get on the ground faster. (Listen to the JFK
tower sometime - you'll hear them. The tower ATC is available on the net.)
My last flight back from Japan on ANA, we did a really weird approach also - seemed to descend very fast and got on the localizer only a few miles from the airport. Probably also a visual approach (was a nice day as well).
The engine revving sounds pretty normal - with flaps and slats out to 30/40 degrees it can take a lot of power to make speed adjustments. And they may have also been a little low on the glideslope, judging by your description. But probably no big deal.
I'm tired of being a wanna-be league bowler. I wanna be a league bowler!