No the loss of the galley won't effect service. From what I read on another board the galleys being removed weren't being used anyway. As for overhead space, unless I am mistaken where the galleys come out more overhead will go in, and where they are being converted from J to economy the net effect should be the same, considering J has a larger allowance and no floor storage. As for upgrades they don't effect 99.9% of the people on board so most wouldn't care less. So overall it will make no difference what so ever to the customer experiance.