(If you don't want to read everything, the short version of my question is, "Are there any tips/tricks you can provide to make a group of 8-10 players to run more smoothly.")
My current campaign has exploded and is now running at 8-10 players. Unfortunately schedules don't allow for the group to properly split into multiple sessions and I've been struggling to keep momentum during the sessions we hold.
Tricks I've used include: operating the group as two sub-groups, each with their own Party card and different goals for a single adventure that (ideally) converge for the finale scene; ensuring the charismatic/impulsive players have the clearest understanding of the situation to help keep track of their team's maneuvers; and ensuring player seating encourages interaction for both teaching and roleplaying.
The greatest issues I face are when any sort of combat breaks out that leads towards players spending time on individual actions. I find my players will be discussing amongst themselves to clarify rules and to roleplay (a good thing), but then not failing to have grasp of situation when their turn arises and losing more time trying to strategize their own actions. Worst is when any sort of "minor" fight breaks out in a situation where all of the characters are present.
Because of the amount of time required by certain players' agendas and playstyles, I feel that others are being left out. Looking back on the sessions, some players spend too much time in the background (only problematic because when it is the players that slighted on time -- these aren't the wallflower players concerning me).
As a first step, I plan to make more queue cards with goal reminders for individual players and for teams to give a concrete reminder of what needs to get done. The greatest challenge is allowing players to be proactive, inciting action in a situation when they want to be polite and let others take the spotlight. I would like to reward players at the end of the night for taking the initiative in certain scenes, but don't want to penalize players in a group this large that were not granted an opportunity to shine. Initially, I had a player-voted MVP of the session gaining +1 XP, but that led to too much drama instead of the 'review of how awesome everyone was' that I was hoping.
Are there any other tips that experienced GMs or natural tacticians can provide that might help run sessions more smoothly?