For me, solo flying, indoors or outside, is all about the music and the mood it conveys. I rarely have any planned routine, just fall into rhythm with how it moves me. I may go into it with wanting to try several things, but where I try them is dictated by the music. Soul flying ......
Team flying is a whole different beast, partly because I'm tailgunner on my team. Our leader usually comes up with the majority of a routine. We fly it to find out if it works or not. Maybe some moves fit better here or there? Maybe some moves don't work as thought, but will if modified? This is a chance for the whole team to have input on it. But still, it fits to the music, the mood, the rhythm.
I do call for many "beginner" lines. I try to determine the skill set each flier brings to the table, and construct the line based on what people can do. No sense putting someone at tailgunner if they can't hold an inverted hover, that means balls would be shaky. BUT, I also try to push them a bit, try new moves, experiment. Do things in segments or slow motion. Talk it out and explain if need be. But push them to come away a better flier if possible.
Funny story: A friend and I were fooling around trying new moves to be different as a pair. Out of those experiments, I built a complete pairs routine - but without any music! One day I heard a song that fit perfectly! Match made by the wind lords!!!