So remember, I'm not a huge hop fan at all, BUT this particular beer the brewer told me had simcoe and mosaic though he didn't give me the schedule. He did say dry hopping too, but I've never done that so I'm a little afraid. So if I eliminate the C60, I could up the base malt a little to get the ABV back up around 5.7%? And double or triple the 15 min addition or the 5 min addition? Thanks, this is all so new to me. I usually brew Kölsch-type beers. And I should ask, mash at 152ish? or 154?
For a pale ale, I'd suggest mashing no warmer than ~152°F, and I usually mash my PAs/IPAs for 90 minutes, but that's just one data point.
Also, i'll echo the other comments re: upping the late additions, as Mosaic is a nice but (IMO) somewhat subtle, understated, etc. hop.
For my tastes, I'd suggest 1.5 oz for the 15 and 5 min additions, and as Morty said, dry-hopping would be good, and 2 oz wouldn't be too much if Mosaic is the dry-hop you use.
your pale ale grain bill looks like a lot of the PAs/IPAs i make, and i make them pretty regularly, and with US-05, you should get a nice pale ale out of this one.