A couple of things I've found regarding the supermatter engine.
1. It's way too difficult to blow it up.
The plasma fire will burn through the floor long before it blows, venting the chamber to space and stopping delamination. On two occasions as a ghost I've witnessed borgs failing to blow it up, and was unsuccessful on my test server last night. I fixed the floor, then replaced the floor tiles with a reinforced floor. Afterwards I could actually get instability above 25% without melting the floor. It still took forever even with gas temperatures in excess of 5000K in the chamber for it to go. My understanding was after 800K it should go boom fairly quickly, as that's how the shard engine I've been playing with works. Crystals may be more stable for some reason, but I don't see why. Which leads to number 2.
2. The result of the crystal exploding was rather underwhelming.
Probably nothing to be done here as far as the map is concerned, but I'll bring it up anyway. I was expecting something worse than a lvl 5 sing. It basically destroyed atmos, and everything to the east as far as the kitchen and bar. Some damage happened further out, mainly cracked windows. The engineering foyer was left intact. I was hoping for something that would be powerful enough to set the tesla(ugh, why do people use this thing, it sucks), or sing loose. Now, if it was placed one rwall away from the bridge...
Now, on to the sing/tesla engine.
Ok, I like the layout of engineering in general, and what I've seen of the rest of the station. This is also my opinion about all maps that use this engine, not just this one.
Take the tesla components out of the containment area and put them in storage. Easy mode engine should require more effort to set up. It's sad that the solars require more effort to set up than the tesla. I seldom see a sing anymore, and a month ago it seemed to be the dominant engine setup. Want to run a tesla? Then drag all that crap out there and set it up, otherwise use the sing. The only round that I've played that used the sing in the last week was one where I was the only engineer, and managed to get the sing set up minus the PA before the CE showed up and asked if the tesla was ready.

It seems I'm always getting into fights over actually wanting to be an engineer, and run an engine that requires attention, not set it and forget it. I guess I'm one of the few who don't want to go easy mode just to run off and do whatever, but it's seriously boring when you can just turn the PA on wide open, leave, and the engine will stay contained. I honestly miss my first rounds where more often than not Lord Singuloth would be an uninvited guest in atmos.
Anyway, i shouldn't be venting my frustrations here. The map is great overall, and making the supermatter engine dangerous might just get me back in atmos where I can ignore the CE's orders to not fire it up.