I know my experience seems unusual, but keep in mind there are thousands of happy diesel Cruze drivers out there that never come to the forums. The forums tend to attract people who have issues with their cars, so it skews the numbers. If you go to any car forum and read a few posts, you wouldn't buy anything!
You're right...
But you're wrong.
You're right if you use this as a statistical standard. The sample size here is excruciatingly small. The few people who come here are information seekers. They also are engaging to either help find a solution or backup a preconceived notion. I also realize people only seek help when something goes wrong.
What you don't realize is forums show trends. If it was a few people saying a def tank here or DPF there, then it's not enough for a trend.
What I'm seeing is a trend of sensor failures in the exhaust system. What's that from? Poor QC? Poor tuning? Poor parameters?
If you went to the forums for Cummins VP pump failures, Duramax LLY overheating issues, or Powerstrokes 6.0L, you'd say there's s problem. Many reports.
How many reports of 6.4L powerstroke cracked pistons, Duramax Lmm broken cranks, or 03-04 Cummins dropped valve seats? Not as much but there's a trend. With those trends are also solutions.