Yeah I disagree with the mini games feeling out of place and tedious with X too. Also with the inclusion of Norse Mythos.

If they were going to go with a 60's American feel which I sadly feel that no one will, especially not the Japanese, I would want the party members to consist of a sword wielding soldier who represents the war image of the world, a pro black sista that uses a kusiragama that represents the civil rights struggle and a hippie girl that's the white mage that represents anti war and sexual expression of the time period.

There would also be a woman that expresses the conservatism and roles of women in that time period. I'm not sure about her weaponry or playstyle though. Another man could represent the music, hey may be rock or soul, either way his weapon would be his instrument and he'll play similarly to a bard or songstress. I'm tired of the six person or three person party as which has been done lately since X so I'll come back later and see if I could think of some more party members.