Possibly controversial opinion: PhDs should be done in a much shorter time. 3 yrs or max 4. Reduce the course load and start the research day 1.
New data on PhD student mental health: "By the 5th year of studies, the likelihood that PhD candidates needed mental-health medications had increased by 40%, compared with the year before study"
This is why, when giving advice to students, I always mention self care
www.nature.com/articles/d41...
nature.com
The huge toll of PhDs on mental health: data reveal stark effects
PhD students in Sweden accessed mental-health services at increasing rates as their studies went on.