I would prefer it if we could choose how many officers to take with us on each mission. I think it'd be awesome to beam down to a planet with one or two other officers expecting a peaceful survey mission, only to be attacked and have to defend yourselves with reduced numbers. Of course, to add tension, we couldn't get any clues that this mission is going to be a combat one until it's too late to request reinforcements.
It would make the choice easier to even beam down if I knew if it was yet another "shoot-em-up" or a peaceful scanning mission. I could drop the mission before beaming down if I knew in the selection screen if just one or all four boff's would show up.