Character conversation portraits are high res for me but everything else isn't. If they're going to update the rest maybe I'll put this on hold and rock my face with MGR so that I'll need something calm.
BD didn't have much of a plot, but the real killer was the aaawwwfffuuulll conversations. If the characters in this are cool then it's all good.
For reference, I liked Ys Oath, Lunar:SSSC, and DQ8, so I can do leisurely story if the characters are charming enough.
It's basically a coming-of-age story. There is an overarching plot that ties it together, but the game balances both low-intensity sidequesty stuff and the plot quests. In sheer volume, the sidequests are longer but technically optional (though they'll help you a lot in navigating the main story battles).
But yes, compared to the average JRPG, it's "slow". To me, though, the slowness helps because when the plot starts to develop in bits and pieces, it actually has impact, and you're thirsty for more. Contrast with the "typical" JRPG that may have the protagonist's village in flames and the antagonists established by the end of the prologue.
There's also an interesting touch that as you advance the main quest bit by bit, the NPCs in the towns will actually react to incidents, and proceed along their lives. As a result it's hard to shake the OCD of finishing a minor bit of the main quest, then talking to people to see their reactions and what's changed.