If you haven’t checked out the Facebook Q&A’s that were posted on the PP site, you should! There’s a lot of great info there.
There’s a few answers in from the Q&A’s that are particularly pertinent here:
Q: What classes can we expect to see in the game, and will there be more classes in DLC?
A: We have a number of classes planned already. We’re not going to reveal all of them now. We’ll be showing some of the New Jericho classes at the PC Gamer Weekender. They have an Assault guy, a Sniper and a Heavy Infantry – but we’re not going to be revealing all of them just yet. And yes, we do intend to release other classes in future DLC.
Q: Will there be more comprehensive skill trees for soldiers than in the Firaxis XCOMs?
A: Yes, is the answer.
Q: How many soldier classes are available?
A: The way the class system works is that each faction has different classes, and the Phoenix Organisation starts with a small set of classes. So, what you can do as a player, as you develop relationships with these other factions, you can recruit soldiers from those factions, or even steal technology from them. You will be able to use some of their more specialised soldier classes. For example, the “Infiltrator” class which comes from Synedrion or the “Technician” with robotic arms, which is a New Jericho class. We haven’t decided exactly how many of these there will be. At the moment there are at least seven. There may be more added a little bit later.
But seriously, check out the full Q&A’s if you haven’t. You won’t regret it.