Munchkin; In ending poses, less is more in my experience. The gymnast must show respect to the routine and skills within their expression of the ending pose. At our gym, more novice athletes the suggested pose works well.
Aaron; The OP asked about the Compulsary L5 routine. There are portions of the dance were "optional" arms/legs/dance can be used. The code book identifies these opportunities.
As to artistry, L6-10, we are aware that a USA-G Optional gymnast can be discredited a total of 0.6 tenths on BB(for example) for insufficient artistry in the entire performance (lack of confidence, lack of personal style or uniqueness), insufficient rhythm and tempo (no variation in movements, speed, movements are disconnected with pauses). In addition to the artistry deductions, there are composition and choreography deductions which include failure to perform movements facing sidewards, with the torso on the beam, not using the whole equipment, and "lack of creativity in movement and transition." I hear clearly in clinics that the emphasis is to increase the diversity of exercise (so every routine isn't jump on the beam, stand on the beam, flip, leap series, dismount).
On FX, the same deductions are applied - COP allows an increased attention to musicality and music theory. Movements of dance must support the music - The example the CoP uses is tango movements to tango music.
IMO, artistry is the ability to perform and sell the routine. The artistic component is not the same for all athletes.
Check out this FIG COP Artistry presentation: Link Removed
Excellent resource.
I have printed this and read it a couple of times. (It has taken me a while to soak up the details.) Some of it does not translate to USA-G, but it is one of the better resources that I have found in describing "artistry."
Best, Eric -