I would suggest if your looking for feedback on a recipe then just ask for it. If not, feel free to share at and then report back with your findings.
My first thought on an extract Pacific Ale would be what % wheat is a can of wheat extract exactly?
According to this its "over 50%"
http://www.blackrock.co.nz/malt-extracts/item/69-unhopped-wheat
So I would be more inclined to go for 2 cans of wheat plus some LDME to boost the gravity.
Your hop additions look tasty, might be slightly different due to the mosaic dry hop but it will still be a cracker. Galaxy has a very particular impact on a beer when used as a dry hop.
Also, at only 4L of boil volume I would suspect hop utilization to be impacted. Try to get your boil volume up to at least 8L. Probably not a big issue with such a low IBU brew though.