In general:
I think we should look to code-based solutions, not simply admin-policy solutions. Admin-policy solutions exist to do things we cannot do with code, NOT to do things we could instead do with code.
I think that any solutions we do implement should be carefully thought out and aimed at (A) making security more fun, so more people want to play it (B) making security more competent, so it has a better reputation, and (C) making the crew treat security better.
Some specific ideas:
I still think we should have a device in processing that automatically times how long suspects/prisoners are in there, and generates an alert on security radio when someone has been in there over 10 minutes. This would help cut down on people being left in processing far too long, which always results in a worse relationship between security and crew.
I also think that batons should have an inbuilt sec radio, which generates a one-time message on sec comms the first time each baton is used on harm intent. This would help magistrate/HoS/Captain notice and stop shitty officers.
I'm also inclined to believe that security should get automatic basic department access on red. This means security officers should be able to simply walk into medical, eng, science, etc on red. The airlocks should open for them. It doesn't make sense to me that security are supposed to have access to these areas... yet they usually don't.
I believe that yelling 'shitcurity' over radio for no good reason, or otherwise needlessly antagonizing security, needs to be a crime under space law or a SOP violation. Security should feel like the crew will treat them with respect, and we should make whatever changes are needed to ensure that happens.
I'm still keen on my idea of 'give the head of every department a medal in their locker that they can award to excellent crew from their department'. Something to reward players for being great at their jobs. In fact in this case I'd go further and I'd deem the magistrate a head for these purposes, allowing them to give out a 'Legal Excellence' medal to whoever they feel is the best at upholding space law each shift, including say IAAs who challenge unjust sentences.
I am skeptical that security cadets would be a good idea, as I think they'd just end up as loot pinatas. Even with lesser gear, merely being able to get a stunprod, sec ID and sec comms from them is already reason enough for antags to kill them for their gear. However, I am willing to let the idea be testmerged and trialed, and willing to admit if the results of such a test prove me wrong.