I always look at the suggested changes. Always. Not infrequently, LLMs want to put new methods in what I consider the wrong place. Not infrequently, the LLM requires pushback and admits it was over engineering something. Finally, if you can't understand how or where something is implemented then when it comes time to fix it you will likely have a hard time finding what to fix. Just my perspective.

Do you ever use the LLM itself to fix the code? Does the overengineering ever create actual problems, or just perceived ones? Just trying to cut to core of the topic, not trying to say you're right or wrong.