A pilot/driver makes perfect sense, but i feel the Sergeant should be backed up by some sort of Adjutant or Aide de Camp style option, basically a guy with basic infantry training but who focuses on stuff like communications and relaying orders and intel.
The Sergeant has an NPC comrade who follows him around and act as a Vox-Tech. As long as the his comrade sticks near by, the Sergeant can transmit orders and give out buffs to anyone within vox range as a free action.
Yep, a class called the 'Operator' is the only one left. It seems to be some general mix of pilot/driver, communications manager, and minor tech priest in the way of knowing a few litanies and prayers.
Yea I'm really glad they added someone who's good at tech without having to go all Steam Punk Frankenstien. The system is is similar to Black Crusade no Rank tables saying what classes can get what skills/talents and when. All characters have access to every skill and talent. You can unlock skills and talents as you like, just some character archetypes are naturally attuned and can get some of them cheaper and faster. Like a Sanction Psyker could become extremely good at wading through people with forceblade in one hand and an inferno pistol in the other. But it will take him much much more experience and time to learn how to do that than say a Storm Trooper or Commissar. Also the Psyker will have to sacrifice a huge chunk of mojo juice and be fairly worthless/unstable when using powers.
You can play a Guardsman or a Support Specialist.
Support Specialists are
Guardsmen are broken down into: