The tactics setting system is very important, and, as far as I can see, not mentioned in the tutorial. Things new players should know about it after the tutorial:

1. The basic mechanic of trading DV for to-hit/damage and vice versa.
2. Changing tactics settings doesn't take a turn.
3. [Optional] Exploring in coward mode is beneficial. A mimic would be a good illustration of this; alternatively, this could be mentioned when the PC is targeted by a missile attack.
4. [Optional] The special coward movement bonus. This would make sense to mention when the PC becomes severely wounded.
5. [Optional] Which tactics modes disallow weapon/shield training. This would make sense to mention when the PC attacks a monster while in coward mode.