Character swapping in battle

[Daddy Poi's Oily Gorillas]

Now time to discuss a mostly trivial feature that didn't really exist in GS unless you had 5+ PCs. (But you had to swap them with the back party to do so.)
Should it be possible to change the order of PCs in battle? (Even if you have four or less PCs.)
Should it use up a turn, or be freely available to change each round without cost?
Why or why not?

[Salanewt]

I don't entirely like the way GS does it, yet it works or can work well enough for the most part. The main thing I would change is to have it be a character-specific action rather than a general free move (or at the very least make it so the character that is switched in can't act that turn). That way most of the strategies that currently exist can still be utilized while making it harder to be cheap. I also like the idea of making the same apply to the standby party when they are switched in, so whatever enemies you are fighting have a lesser chance of being suddenly disadvantaged.

PC order in battle: Doesn't really make sense, especially with four or less. Anything it would actually do for you is negligible with the added bonus of "why are they willing to awkwardly shift around in battle, yet completely unwilling to break the turn-based aspect of it?" Maybe if order actually made a tangible difference beyond things like AI or equal speed checks, but then the question is what that difference should be.

[Luna_blade]

Is it just me, or did nobody ever had to switch characters in battle except at Dullahan?

[dive_darkness]

I did everytime a boss used djinn rage or it's single target variant.

[Salanewt]

Rarely, because it's generally a waste of time when most battles end in a couple turns or so. It would be nice if battles in new areas lasted longer until you are almost done said areas.