set crews has its pros & cons.
no matter if set crew or not, certainly always good, in theory, to have 1-2 old salts; 1-2 guys w/ 5-10 yrs; & 1-2 guys with less than 5 yrs.
Perhaps good NOT to have set crews so guys dont fall into routine & are on their toes.
Conversely, being on set crews does allow for knowing one another's mechanics nuances, etc.