Positive hyperspace, thin spots, an interesting idea! could you reduce fuel usage in those spots instead of a speed boost? It would be a nice way of economizing fuel and possibly a way to limp back to civilization if you’re low on fuel since technically it’d be trading supplies for fuel.
Also riding out a storm sounds like fun, reminds me of the American clipper ships running sail through them just for the extra speed, no matter the cost to the canvas. Could be a fun hull mod, solar sail/hyperspace sail, extra speed/reduced fuel usage in storms. If you make it useful enough, you could literally trade supplies for fuel if your short on fuel.
Alex, another thought on the storms striking random vessels, if you do that, you could then animate a lightning strike or some other to visual show the player that somethings bad has actually happened.