I think the only thing I truly agree with in this post is that you've given b4 more 'Move Points' than a4.
Opening moves can't be ranked by such a system- the game is too complex for that. While it does tell us one thing about the move, there are others to consider- for example, 1. a4 does not stake a claim in the important central squares. You say it has opened up the rook, but 1... e5 refutes this quite nicely.
It is very important to have a very good and steady opening.And for that to happen you need to concentrate on first move.Like this
It is wise not to start with a pawn moving one square.
When a pawn has to be moved it is wise to move it two squares.
Analyzing the possible legal first moves.
a4-This one is one of the weakest openings.
This gives the pawn control over b5 square and the rook over squres a2 and a3.This can be avoided.Move Points-3(2 for the rook and 1 for the pawn.
b4-It
is a good move as it gives the bishop contol ove two squares b2 and a3.Pawns get control over a5 and c5.Move Points-4
The other openings will be discussed in The Battle Begins-Part II