Your campaign sounds like a great deal of fun thus far.
If you'll doing post backout stuff you might want to check out Target of Opportunity, the next novel after Scorpion Jar. It goes into the Comstar response to things so it might be of interest to your Comstar player.
It sounds like you have mostly Pcs of Comstar and Republic backgrounds. It's a time of great upheavel and problems for both groups. The Republic in particular is under great strain with the Great Houses getting anxious and eyeing the chance to take back lost territories.
If things come down to mech combat do you plan it out with Battletech or Mechwarrior? If your buddy still has his stuff that might be an option.
That's the one with Tucker Harwell isn't it? If so, I've read it and it is one of the few DA/AoD novels with characters that I loved.
As far as the campaign is going, it is a lot of fun so far. For characters, I've got:
A green-as-grass Mechwarrior Lt. fresh from the academy and in charge of a lance of Triarii Protectors on Acamar to show the flag. She is also a native, so she has a "hometown girl done good" vibe going for her. She is also strongly loyal to the RotS (Compulsion -2).
Her older sister, who has taken more and more of the reins of running the family business over the past couple of years and is being groomed to take over for their mother when she retires. She is fairly ruthless and isn't particularly loyal to the RotS, but she has strong loyalty towards her company and her family (Compulsion -2 for both).
The ComStar Acolyte who is the liaison between the planetary govt. and the Order. He is fairly jovial and a bit on the lecherous side (Compulsion -1). Think a semi-sleazy, mid-level manager for a Madison Avenue advertising firm.
A BA trooper with a bit of a drinking problem. He has some slight loyalty to the RotS (Compulsion -1), but he is mostly in it to fulfill his service requirement so that he can vote and own property. He mostly wants to start his own ski resort and tourist business on Acamar. :D
Also, the sisters discovered in their first adventure that the Enemy -3 that each of them had chosen was the Planetary Governor, who has a strong grudge against their family because she (the Governor) blames their mother for costing her the last election to the Republic Senate.