I agree with the OP on just about everything, except I would put SC on the LBJ margin map red.
I think it's not an opinion.
So the maps are factual pieces of data and I shouldn't agree or disagree with it 
I'm assuming what the OP did was take the PVI for each state and apply it to a baseline national popular vote equivalent to one of the prior elections. LBJ won by 22.58 percentage points. So if, say, Texas is R+10, then the Democrat will carry Texas by 22.58-10, or 12.58 percentage points.
So you can agree or disagree with using that method, but it doesn't really make a whole lot of sense to cherry pick states unless you're willing to offer your own alternate method to extrapolate results.
