what's the lore behind the qdrive? if i knew this i could give a better suggestion.
however, i think you should have to have engines to turn to the warp vector.

Pretty much, you turn to warp, must be pointed at the ship, and warp out at a pretty fast speed. During warp, you can't be harmed, and theres really no limit to how far you can go. If your warp drive is disabled, you can't warp out. Running out of power in qdrive at the moment only slows down qdrive, doesn't stop it (prob should stop it).
It's pretty basic, having turning stop completely would be a bad idea, as you wouldn't defend yourself at all. Though, I was thinking about it, at this time if your ENGINES are disabled, your rotation rate slows down. Perhaps I should increase the delay on rotating when engines are disabled. So you can still rotate, but at a slow rate.
In the future i was thinking 'specific' devices or weapons that hinder a specific module, much like HEAT missiles do (Heat missiles disable engines, most people probably don't know that, hard to hit with those though since they only move when a ships moving (aka heat of engines). Could have a 'interdictor' to prevent warp in a close range, for example, etc. I was hoping to make modules and weapons alot more 'defined' in the future, though.