Stories of my golden days aside, there's still a great deal about BS12 that I don't like, listed here in approximate order of dislike. Please keep in mind that it's been a few months since I played, so some of this may be out of date.
I hate the NSV Luna map. More than anything else, that persuaded me to stop playing. Playing my preferred job of engineer is an absolute nightmare on that ship. Accessing tools is bizarrely difficult and the complex. In order to get a mechanical toolbox (commonly know as "the useful kind") I have to go up a deck, snake through an oddly bent hallway around the ship's library and walk clear across the station or make a similar trek past the observatory, oddly huge courtroom and a BIG EMPTY ROOM THAT IS ENTIRELY SEALED OFF FROM THE REST OF THE SHIP. The entire medical department has easier access to mechanical toolboxes than engineering! The janitor has one such tool box right in his closet! "Plasma research" has two mechanical toolboxes, and last I checked their only purpose was to be a one-stop shop for traitors. Furthermore, the multi-level setup make repair jobs an absolute nightmare, since wiring faults can occur between levels while remaining almost impossible to locate or fix. Beyond all that, it is far too big. With the relatively low server population, encountering another player by accident almost never happens. It also makes it that much harder for engineering to access or fix problems in a timely manner while letting traitors get up to all kinds of stupid crap.
Airflow is an incredible pain. While blowouts should be scary, a 5kpa pressure difference should produce a bit of wind instead of a bone-pulverizing maelstrom. Since fire actually destroys oxygen instead of substituting some kind of plausible waste gas, minor pressure differentials often develop between damaged rooms and the station as a whole. The resulting gust of wind upon opening a door is often enough to mortally wound any first responders. When I left the game, the most powerful booby boobytrap I knew of was to open a plasma tank and leave an active torch/lighter nearby. The fire would burn out rapidly, but the resultant pressure differential was generally sufficient to kill anyone in the next three rooms as soon as a door opened. This is all made much worse by the fact that airlocks only block atmospheric flow when closed. Spacewalks can easily turn into mass blowouts if you don't work the doors quite right. Combine that fact with the fact that the ship's main exterior airlock connects directly to a major hallway and it becomes trivially easy for a traitor/griefer to murder the entire station or damage the atmospheric balances beyond engineering's ability to fix.
The automated threat containment locks are a major danger to the crew. They all too readily re-activated after being disabled, frequently forcing me to saw through walls in order to access a disaster area. On those rare occasions that I've been inside the hazard zone, the locks have often resulted in the death of my character by trapping me in a room with an easily escaped hazard. While I can think of many cases where the auto-locks have killed crew members I am at a loss to recall even one such occasion where they may be credited with saving the life of one.
Finally, I am sick of the standing admin prohibition against killing traitors for any reason. I do not believe that someone who has murdered crew members and is intent on slaying the remainder should retain their right to live, especially in the heat of combat. Apparently there's some notion of due process, but the one time I bothered holding a trial the resident admin responded by opening a black hole in the courtroom and fussing at me for keeping the traitor restrained. That was the last time I ever played a security position. I've been threatened with bans for killing traitors as an engineer, responding to a blood-covered manic standing over a body with my blowtorch and on one memorable occasion for opening one of the bridge windows in order to kill a traitor who had murdered two people and locked hostages in a nearby room. I can understand barring security from just killing a bound or nonviolent prisoner, but refusing the playerbase the ability to respond to murders with lethal force is unbelievably dumb.
Finally, broken bones are annoying and more difficult to fix than they have any right to be. Combined with airflow issues, they quickly become tremendously unfun and can ruin a round.
EDIT:That and all the weird coding side-projects that have sprung up like broken bones, anomalies and virology without fixing longstanding and annoying bugs like the dysfunctional cloning pods.
And it appears that not only is the wiki poorly edited and out of date, but almost all of the recent changes are stupid keyword ads for online pharmacies.