One of the most important methods to improve, AND self-assess is to time your runs, or have a buddy to time you. Two or more guys running the course makes it more fun and interesting, you get feedback and coaching - AND you get TRUE assessment of your improvement - TIME.
Bottom line is, you can talk about the best line, technique, lean angle, braking, acceleration, etc. and it is all meaningless unless your time is improving.
Most smartphones have a stopwatch, or a free app you can download. 5 seconds is a BIG deal.
Pull out the timer.