Indeed, we have quickly increased the number of improvement rolls as well. We play once every 2 to 3 weeks, and people want to see improvement, they wanna have fun seeing their character grow. Plus there are so many areas of possible improvement, the RAW rolls just don't cut it. After a standard 5 hour session, most of my players get 3 improvement rolls. For particularly heroic actions I sometimes give out a hero point (we use glass beads to represent them) which players can exchange for an additional 3 improvement rolls. We still use the heroic abilities as well. Even with all that, after our first campaign which recently ended only two characters survived, and for our upcoming Pavis campaign all other players will have to make a new character. The two survivors are a Lhankor Mhy Acolyte and a sneaky assassin. I'm sure there are lots of little inconsistencies, but people love the game, we have several people on a waiting list for joining we're in a gaming club, and we could play twice a week if only I could keep up with the prep, so we must be doing something right.