It can only hold 5-9 things in working memory at any one time, so the larger the chunks, the more that can be remembered. Remember we have this large repertoire of figures to draw from. In other words, a dance which goes Rights and Lefts, Reels of Three on the sides, Down the Middle and Up, Poussette is easier to remember than Set, Cross, Cast, 1M turn 3L LH while 1L turn 3M RH - and it's 32 bars instead of 8. Dances are also easier to remember if what comes next flows logically. If the whole dance is meanwhile figures, though, it becomes a test of mental agility.
Flow is nice.
Flow is good. But too much flow, and the dance loses definition and becomes like wading through a bath of toffee yoghurt. Think about how long a figure takes. This is one of my hot buttons. I think corners should be positions.