Love the mod, weapons and ships are wonderful to play with.
Nothing better than giving pirates a good ol' macro cannon and lance broadside!
But I got some ideas regarding this cool mod:
The imperium sprites are very pretty, the others I feel like need a bit off work, I feel like like you could do alot by making ork ships more rust-orange-red instead of pure ballpit coloured.
Chaos fleets should be a bit less glowing red and more dark, metallic red.
For Tau I am not sure but more details on their hull would be nice. they seem kind of empty which is understandable cause I wouldn't know how to do them either.
The first two things wouldn't be huge changes I think, but it would make their ships look a lot more like they are supposed to look.
I must admit right now some but not all of the non imperium ships look a bit goofy
ps: I am sorry to hear about your huge loss in mod data, I might do some of these things mentioned above myself and will share my results with you if I do.
I hope to see this mod improve and become even better than it is now.