I'm a bit worried about the multiple turn thing because it seems to go against the goal of fast gameplay. Look at the youtubes and you'll see people in the menus for near 30 seconds even when all they're doing is having everyone attack four times each.
That's only because the videos posted here are of players in low-levels (and Job Levels) without much in the way of abilities aside from attack. It's not necessary to use 3BP with all characters in normal encounters if you have strong AoEs or take advantage of elemental weaknessess that enemies have. I've seen higher level Japanese players only choose two actions to wipe out enemy parties. It's ultimately to the player on how he/she uses the tools given to them that determine battle efficiency and length.