That'd be great, eventually. But right now each class is pretty limited to one of two builds. Beyond that it's mostly relying on whatever you do with your gun. Which, hey, it's a shooter. So most of the time in the beta I more or less forgot about any class abilities, except when I noticed a group of baddies all standing together. Generally I would end up forgetting which class I was playing until I saw what color my grenade exploded as.