How are they rewarded? There is no point value assessed to them. A skater who did a classic layback or scratch spin instead of a pretzel spin would lose points. Transitions could be considered as part of composition and skating skills as part of performance/execution.
Equally, musicality can be combined with interpretation, because the skater’s contribution to interpretation is a reflection of their musicality. If skating skill is part of a performance, the je ne sais quoi doesn’t get graded.