http://www.pcgamer.com/ea-responds-to-community-criticism-of-battlefront-2-unlock-system/

Star Wars: Battlefront 2 Origin Access players have been making their voices heard over the game's unlock system ahead of its release next week. In particular, they've taken to Reddit to complain about iconic characters like Darth Vader being locked from the start as well as the length of time it takes to unlock characters.

One user calculated that because of the fact you earn in-game credits based on time played, rather than your score in a match, it will take up to 40 hours to earn enough credits to unlock characters like Luke Skywalker, who costs 60,000 (the cheapest character costs 20,000). Their calculations purely take into account credits earned during matches, not credits earned by completing challenges early in the game: eliminating your first five opponents earns you 1,000, for example.