The first answer with arranging lies in the original music itself : it must have a value of its own to be worth arranging, and not just be a space filler. Whether it is a straight transcription, or it contains a lesser or greater degree of creativity from the arranger, right up to the point where it can be claimed as an original work, an arrangement needs a musical value to exist.
The second value present must be the qualities the arranger brings to the table.
The third answer, and all the other answers, flow from the players and the conductor. How good and imaginative are they, in matters of playing, platform presentation and anything else that bears on the performance ?
It is easy on a cheery Saturday evening when the audience is geared up to have a good time, but try a wet Friday night when every member of the audience, arms folded defensively in front of them, is challenging the performers to force enjoyment on them. Those are the nights when you learn your trade...