Is it with regards to aircraft safety or just plain quality?
It's a combination of both really... Yes, quality is the biggest problem and that's due to the lack of infrastructure and good flight instructors... Ask current ground instructor's in India and they will tell you the truth about the knowledge and the caliber of the Indian trained pilots (bar IGRUA)...
Another problem with Indian schools is that they are renowned for over logging of hours and hence you will find that some airlines have blacklisted some training schools here...
And you will find most of the existing pilots (who currently have a job) being from Air force or have done their training abroad or IGRUA in India...
I don't have any first hane experience about them but i am made to believe that AAA in Ahmedabad is good and much better than Yash airways...