Hi Andrew
The experience rules as written are quite generous since I wanted to have characters developing quite quickly and in the direction players wanted. We tend to play short campaigns lasting 3-6 months.
However I am in the process of putting together some alternative rules, which I'll post on the OQ Companion, that work better for a more slower pace of game.
Answers to your questions
1. Session should usually refer to the complete adventure.
2. Skill raises as Char goes up. Yes it does lead to lots of rubbing out if your players are constantly upping their scores.
Glad you like the game
