Jeff, nice page. I started trying to compare air-defence ships in a similar manner to I compared navy's anti-ship missile throw-weight but I don't know anything like enough about the sensor side of the equation and the level of detail I was looking at was too much. You do a much better job at it.
But a few thoughts I had that might interest you...
I was looking at the positioning and arcs of fire for the various CIWS when calculating their defencive worth. A typical calculation would have been:
1) Calculate horizontal arc of fire (give or take a few degrees), and using maximum effective range and elevation calculate the rough field of fire as a volume in meters.
X
2) Calculate the weight of a round and multiply by the maximum concievable number of rounds in 1 minute or until the magazine would run out, whichever is shorter. Use the assumption that the gun would be fired constantly even if barrels started to melt.
X
3) Factor for fire control systems etc. This is the hardest so I'd be inclined to use a very basic 1-10 style guesstimate.
X
4) factor in the number of targets that could be engaged at litterally the same second (not one after the other). A big factor here is how many CIWS and the number of FCR etc.
Similar approaches could be taken with most weapon systems including SAMs.
A lot of work, perhaps better if there are only two ships being compared etc.