Wow..damn you did get banned over night? I am going to answer the questions for the others still.
My first improvement would be to add better Briefings to the game. I don't like the standard Briefing where it's just Hello->Squad Orders->Dismissed. In my opinion I like the Briefings Greg is doing but marines are hasty so holding them up for too long would cause problems too. That's why I would add minor further stuff about the situation, like about the Mission Site we are heading to and what marines should take care of the rest I put up into papers and distribute them to Squad Leaders where it gives them additional stuff to go with. In my papers I write about Rules of Engagement, the hierarchy and which division we are in, what factions there are and if they are hostile or friendly and which OB warhead is loaded.
Another thing that drags my attention is the breakfasts, basketball games, memorial and card playing games that people were doing in the past but I rarely get to see anymore. I liked them and would encourage them to try and do some of these. Lastly it should not be forget to mention that the CL is mostly getting ignored by the CIC staff and the crew. They should get more attention and the rounds I played XO, whenever I had time, I gave them my time and filled out their documents with them or talked about regulations regarding the Operation.
2. Demoting him would be the minimum of proper actions taken against him. Such situations should not even happen to a SO and leaves doubts about his ability to OW correctly. If he did it on accident, this cannot be considered as murder though according to Marine Law. However if he did it with ill intent, I would brig him in for murder.
2a. If I have witnesses or witness myself how the Dropship is getting overrun and he evacuates it was totally in his right to take off considering the immediate threat to his life and to the marines on the Dropship. Whenever I am XO and a full evacuation is going on, I order the PO to either take off if he sees how the Dropship is getting overrun or I give the order personally. But if he took off without hostiles even being close to the Dropship and left back marines that could have been saved that should be considered as Desertion and I would inform the MP's of the incident to wait at Almayer to arrest him. Except in the situation the FOB is not completely overrun yet I would send him back down quick to rescue the ones left back.
IC Wise: In terms of Marine Law Jones has the same rights as a human being and this would be a case of murder and kidnapping. I would deputize Staff to go and arrest him.
OOC Wise: As far as I know, stacking up bodies on the landing pad and gibbing bodies is not allowed and I would ahelp about this.
I would stop him from planting the C4 by flashing/disarming/pushing and call for the MP's while holding him down. After we securely restrained him, this would be counted as assist in escape and punished as a capital crime.
The first and most important task here would be to fill up Requisitions with a Staff Officer giving him permissions on his ID. The Staff Officer then would be ordered to go and order IO's kits, jtac kits and materials for the FOB. The next step would be to fill in the position of the driver with the Staff Officer. I didn't get a chance to spectate a Staff Officer to drive the tank but regarding the wiki page they have the skillset Vehicle Operating = "Trained" which should be enough to drive I suppose. If the Staff Officer cannot drive the tank I would go check for a synth and send him down to fill in the driver seat. The CIC can easily be manned by two SO's and by me with or without the XO. Then I would make a announcement to boost morale and tell them to gather corpses and use AUX Support as much as they can and work for Defcon 3 to get Cyro troops and OB ammunition or Requisitions points to make a tide here.