Scruffy Looking Nerf-Herder
If I spend a navigation command token, can I choose to not change speed and just waste the token?
Yes. The FAQs cleared this up. You still "activate the command" for the purposes of the rules but the effect of the token/dial is no effect. This is important for cards such as Engine Techs: that is to say you still get yo use any upgrade cards that require the command to be activated yet you still choose NOT to change speed or Yaw.