Concert photography is my main interest, so I had a close look at this photo.
It works perfectly as a band photo and the musicians might like it for the composition as they are all depicted in a group shot from an unsual angle.
I do have a "but" and this comes with the stage floor that gets too much emphasis and it seems to be rather unimportant. When I tried a little photoshop to keep the light on the group and darken the floor and the shadows on the wall and adding some more blue to the slightly overexposed guitar player your photo becomes an alluring one.
You might like to consider to give your pic a small enhancement it certainly deserves in my opinion.