This, and also for after venting. Along with a buffer for paused actions, that would help a lot. Shield status could also be tied to a small indicator in the hud so we don't have to rely on audio cues alone.
Currently the game has a short buffer for right-clicks during pause, but I'm not sure if it's consistent. Would be great to have this unlocked, as in: If your shield is up and you click 20 times, your shield stays up. 19 times, it goes down after unpause. And so on. As long as there's an indicator what state you are coming out at.
Another option would be to have it just change states once, from 1 to 0 or from 0 to 1, but then you're locked in after a misclick.