Apologies for resurrecting this thread with my fell necromancy, but since it's a sticky I suppose it's kinda allowed.
I've just had a few thoughts on chambers that occurred to me at once.
1. Reactor power boost, as it is now, is strictly worse than simply making the reactor bigger. It could be much better than this, however, if the boost power is a temporary toggleable effect with a stronger boost - kinda like how thrust boost is also a temporary but large thrust increase, an active reactor boost on the hotbar could be used in critical peak load times to give a massive power increase for a few seconds, and then consume power to recharge. It'd be a capacitor, in other words, and could even be renamed to a capacitor. This'd be something that could be actually worthwhile, but situationally, and not something every ship would need.
2. Move all the power efficiency trees to the power chambers, making the other trees less cluttered and giving the power tree more to work with.
3. Mass chamber rotational gravity - there is a viable way to do this that makes sense! Have it only apply to docked entities moving on rotator docks, not the parent entity, and the gravity would pull away from that docked entity's axis of rotation. This would make gravity areas on space stations, like O'Neill cylinders, and on ships like the little rotating ring crew area from 2001, workable and intuitive - and it'd negate all the issues that centrifugal gravity suggestions had previously since the effects would be entirely dependent on intentional design AND activating the rotation.