Probably due to tyres. I've replaced the dealer fit Bridgestones with Michelin PS4's and it's transformed the car. It was always good (no issues on motorway) but now it's a lot more planted and hugs curves better.
To answer OP, my biggest issues coming from a BMW (e60 520i) are:
- Stupid automatic wipers stay on so next time you start the car in the rain the wipers 'wipe. Grand until the windscreen is frozen and you panic as the wipers self destroy themselves.
- The heating is grand but on long journey's i find it randomly blows in cold air. So you are driving along all snug and cozy and then you are freezing... May just be my car though.
- Stupid touch controls for heating. Can't use them with a glove on and they beep loudly, not good when you have a sleeping child in the car.
- Radio turns off when you turn off the car. On a BMW it will stay on for a while until you lock the car.
- Even worse you can't open/close the windows unless the car is on, not just accessory mode but ignition on. Stupid stupid design. My car has electric steering wheel which moves away when you turn car off. So every time i want to adjust the windows i have to turn the car on, which makes the wheel move.
- I miss having everything controlled by iDrive. e.g. the tyre pressure monitoring.
Otherwise i love the car. Much more relaxing to drive than the BMW. I love the cvt for lack of gear transitions when driving.