Liking most of these changes.
Although, I must say I dislike the concept of invulnerable missiles or nukes. Honestly, if I want to win a war with these mechanics, here's the simple solution: build and nuke.
That's not very constructive. While it is nice that the shift in mechanics makes ships, missiles, and nukes more effective weapons, the resistance removed by nukes/missiles is way overpowered atm.