Therefore the pilot of the OP did nothing wrong, and the captain had no reason to reprimand him or to call for a go-around. But suppose the captain said something like: "Look here, your landing was good, but it would have been even better if you had managed to cross the threshold below 50 ft" - would you disagree with him?
I would heartily disagree with him. A 3 degree glide path to a 1% upslope would be 70' above the threshold for a 1,000' aiming point. If you try and make 50' over the threshold I reckon the only practical option is to increase the RoD of descent below 200' which isn't really buying into the spirit of a stabilized approach.