I picked up my Legacy GT Premier (XT in the USA) in October so I haven't had as much time to experience some of the issues that everyone else has.
So far no CVT chirp on my end. I haven't experienced the CVT searching for gears as I am mostly in the city so starting and stopping are quite common. It did take some time for me to adjust to the auto start/stop as it is often inconsistent when it will engage regardless of how far I press the brake pedal. I have gotten used to it and it does not bother me anymore.
The head unit can lag at times especially the first few minutes when you start the car. I noticed that it seems to pause all media except for radio even though it has recognized me as the driver. I prefer physical buttons for climate control as well as heated/ventilated seats.
The eyesight can be quite aggressive so I have turned of lane monitoring. It does tend to freak out often when a car up front pulls out of a side street even though there is plenty of time for me to brake. This is something that you just have to get used to.
I knew what I was getting into when I purchased this vehicle so many of the annoyances are not deal breakers for me. I used to have a 07 Legacy GT which was a blast but now as I get older, I actually like the quiet smooth ride more. The car has plenty of power and the interior is still the best I have seen in a Subaru. I would recommend a WRX if you want to have more fun in a Subaru.