Not to sound rude or patronizing but those systems aren't about being safe for transports to pass through. Removing CD would remove it from all of them, it's not a system-specific property, so it's not a solution. What could happen is that there can be more narrowly defined zones which would have extra spawn rates, so you'd have to avoid those areas on a transport, and they could be naturally arranged in such way you wouldn't be able to go AFK flying straight line either, but that'll be a risk you can either take or fly a detour to try to get in one piece.