Yes, I was considering having some ground battles, but certainly not in the first release. And besides, I'm no modeler, and I don't really have the skills to do something like that.
As for the proton beam, that won't work. Abilities, unfortunuately, can only be modified to a certain extent, and you can't create new ones. The DSII super laser is fine in the fact that I can change it's color, the amount of damage it does, and it's sounds. The downside to using abilities, is that you can only have one instance of the same ability for each unit, and the DSII super laser won't fire automatically. Also, the star destroyer proton beam has to be placed on a bone with a certain name.
I'm going to look through all the existing code there is to see if I can find anything that I will be able to implement to get this working.
Looking through the xml tags, I think I might have found a way to do a charge up sound. I'll test it when I get home, but if works, I shouldn't have to worry about using abilities anymore.