I've been trying my hand at Grisette recently. I'm just going off the info in Farmhouse Ales, but from my understanfing of the style, your starting gravity is .005 to .010 too high, you only want 16-18 ibu and with the late hop being 2/3rds the amount of the aroma addition, should be 75% barley malt & 25% wheat malt, skip the carahelles, and use wl550 or another belgian strain that is more fruity/estery and less phenolic/spicy. It's supposed to be a low alcohol, golden, lightly hopped beer 'of no great distinction.' That is too say, something a miner can have with lunch, and not go back to work drunk and smelling of beer.
That being said, it looks like you have a good recipe for a hoppy, saison influenced ale. I think there are probably some good 3711 threads if you poke around with the search a little bt.