In For RP2, graphic elements were predominantly used as a reminder of text instructions.
In Nighturts, the black and red lines were used as a way to show straight, abrupt, and parabolic increases and decreases in tempo and volume. Visuals were also simplified by using a cut-away score.
Gestural Pitches uses its graphic elements as a way of showing pitch information relative to previous pitches.
I love the temporal ambiguity, yet visual exactness, of spatial notation, which is why I used it in a draft of ACCORDION FOR THE PASSIVE AGGRESSIVE. However, ultimately I decided to use more standard notation combined with the instructions “very free rhythm” and “approximately in time.”