What could be causing my 2009 Jeep Wrangler to "miss", especially at lower rpm's?

Computer Control Module needs to be reflashed it sounds like. The dealer has the required components to fix it

Some condensation is normal, especially if you drive short trips. What to watch for is coolant lose and check the oil to see if it has turned milkly on you. this would indicate that you have a blown head gasket. if this is the case do not drive the vehicle anymore, as this will cause more damage to the engine.

Your oil is thinning out too much. Lucas oil additive would be a great thing for this or an oil change with a little heavier weight oil The other cause of this could be piston slap from low grade fuels.

The problem is one of your coil packs is bad. Don't throw money into sensors, they are false codes. The problem is coil packs.

They acually have an Rapid response for this. This should have been replaced before the car was even sold.

If your vehicle was purchased in the USA, it is against federal law for a dealer to sell it without a cat. If you are somewhere else, I have no idea what laws are. I have no idea what "cruising with the clutch" means.
Your oil pressure dropping may only show that at the same time the engine has stalled or is turning so slow that you are not making enough oil pressure. I would check the throttle position sensor, map sensor and idle air control valve for proper readings and operation, also check for minor vacuum leaks. It seems that your idle is too low and allowing the engine to stall. There are other things that can cause this besides what I mentioned but those are the main ones I'd check first. Testing can be done with a decent multi meter and using a chiltons or haynes manual as a guide.
Control systems need testing to get a proper diagnosis...That's one thing I can't do from here.
Do the testing and likely you will find the problem. Many larger parts stores will do a free code scan...that too is helpful.
Good luck

bad fuel pump can cause this or plugged fuel filter but i believe they are one unit

The check gauges light is normal because at 400 rpm it isn't running fast enough to build sufficient oil pressure. I am guessing maybe a vaccum leak???

I have the same Jeep and same problem. The engine was running rough. The Jeep dealer fixed a vacum problem in the manifold and they then decarbonized and cleaned the fuel injectors. After these repairs the idle problem began, it would spike to 2000 rpm while sitting at idle, sometimes it would slowly come down, sometimes I would have to tap the accelerator. I took it back in and they then replaced the throttle motor and reprogrammed the PCM (Power Control Module?) Still same problem. Now they suspect a another vacuum leak and I am taking it back in on Tuesday, will let you know what happens, $ 1,300 so far.

If grounding the dash does not work, try putting a mechanical gauge on it and reading actual oil pressure. Pressure does change while driving, but should not wander. With mechanical gauge, check that running hot at idle (in gear if automatic) pressure should not drop lower than 15psi (I'd rather see 20) High reading should be around 40 -50 but no higher.Low pressure indicates a loss of supply or bad bearing on the crankshaft, high pressure may be caused by sticking pressure relief or restriction in an oil passage.