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As stated looks like one issue is the valvetronic motor gasket is leaking. This would definitely account for a rough idle as it results in a vacuum leak not just an oil leak.
I had a leaking valvetronic motor gasket and had the rough idle and misfires too. I didn’t think the misfire was related to that’s gasket but I can tell you this, once I stopped that leak with a carefully installed new valvetronic gasket I had no more misfires, rough idle, or any issues whatsoever. Replacing that gasket is a good place to start and is an easy 1-2 hour DIY depending on how handy you are.
The oil loss is that gasket leaking and dropping oil down onto the headers where it is largely burned off. And it only leaks when the motor is running that’s why you don’t see drops on the ground.
A fuel smell is another issue altogether and leaking injectors are definitely a recurring issue on the direct injected BMW motors.
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