So this confirms there's a Double Speed mode you can toggle for battle. Buuuut, the damage numbers show up for way too short of time, which is trash, and a common problem for this type of game speed boost. Bravely and Trails have that same problem.
Overall just looks like the original, but with several times the budget.
You can see that three of the characters appears twice on the world map for their next chapters, and the merchant appears FOUR times. I'd have first assumed that this is because one of them was a Connected Path chapter, but the Merchant has some Gold icons next to his map icons so there's likely some alternative progression method for his campaign, like Armic/Torneko's campaigns in previous multi-protag RPGs. IMO I think my guess in an earlier thread is right and there there's a Town Construction sidequest for him, which is the 3 icons with Gold, while his main chapter is the icon without Gold.