I'll look into modeling hull damage, etc into the mesh. Not massive, cruiser sized chunks, because, to me, that'd hurt immersion more than help it, but somewhat smaller chunks all around.
Though. I don't want to do this for subsystems, because the engine doesn't differenciate between a subsystem being destroyed by an antisubsystem weapon that does not do any physical damage, and a weapon that's meant to do physical damage and hits the subsystem and destroys it. Too many instances of a ship being disabled by antisubsystem weapons and then being repaired even though it has large chunks of its engines missing.
However, if some beautiful coding god manages to get something like that coded in, me love you long time.
I also think a decal system similar to Homeworld 2 would be awesome and nearly as good, but I doubt we'll be getting that anytime soon.
No, the Legion isn't going into the mediavps. Should we add the Saturn, because it's a retextured Hades? Should we add the numerous retextured Apollo variants, etc etc? No.
I may do a Legion variant but don't count on it. It's so low on my priorities list for this mesh you'd as well consider it not there at all. Certainly not going to hold back the main mesh, in any case.