A grey FAMO is in the works the Pzkfw IV has messy normals & will be fixed at some point, as for the Katz that’s just because of the way it's shaped really.
I don't want to be anal, but looking at the german pic there are a few things that stand out.
Japan isn’t the most formidable side when it comes to ground forces but it can still hold it’s own, it’s main strength are in it’s airforce & navy tho.
Japan looks like it will be tough to play
As for Italy they actually have the worst ground units of all seven sides, their post-war units are the equivalent of mid war German tech etc. they will be the most hard to play as, the only advantage being that their stuff is dirt cheap.