These are two feature requests, both should be in MegaGlest by now, but all GAE mods can benefit from them, and Apocalyptic Dawn (formerly known as Military) will use them.
Animated Projectile Models
As the name implied, you should be able to use animated models for projectiles. Currently, it uses a single frame, so the animation is wasted. As well, splash attacks should be able to use animated models as well.
Multiple Particles on Projectiles/Splashes
Also as its name implies, we can currently have as many particle systems as we want on unit particle systems, but splash and projectiles are limited to one. As per the discussion on MG's similar post about this, we would need to be able to specify when the particle starts or begins and where it is, relative from the model. Other than that, it's just a standard particle projectile XML.
If these appear in GAE in the future, a rather ambitious MIRV may appear.