Haven't finished Graces yet, although I'm ~30 hours in and I'm not even sure if I'm 1/3 of the way through the game yet.
I'd say if you want to 100% with all first playthrough sidequests, that's a solid 90ish hours. I ended up at 104, but time runs when you go to the XMB in game so that was maybe 10-15 hours paused.
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