The idea that all items salvage for the same value seems off. If you get the luck for a better item it should be worth more.
Could go like this:
Common (White) Bulletin 250
Rare (Green) Bulletin 350
Rare (Blue) Bulletin 500
Victory Strikes 500
Faceplates 750
Skins 750
Common (White) Commander 1000
Rare (Green) Commander 1250
Rare (Blue) Commander 1500
Yeah, I am with you on this one. The idea that you get the same benefit from salvaging a rare commander as you do salvaging a rubbish common bulletin is a tad unbalanced. The salvage value could be based on a percentage of the cost to buy that item. eg. 10% or so.
One rather important thing to note is that they are reducing the likelihood of a commander dropping from warspoils.
I don't know by how much, but I would imagine that it would be pretty rare in the future for a commander to drop.