There are many suggestions on improving the PGP program, I am not sure if there is any formal portal through which we can communicate our suggestions.
I found on canadavisa.com below article for improving PGP program:
https://www.cicnews.com/2019/12/how-to-improve-canadas-parents-and-grandparents-sponsorship-program-in-2020-1213347.html#gs.pe7pkt
Here is main snippet which is worth discussing here:
Parents and Grandparents Human Capital Pilot
One innovation for consideration is introducing a human capital-based approach to managing some PGP applications. The federal government could launch an Economic Class pilot whereby parents and grandparents who are younger in age and have higher levels of education, work experience, and English or French proficiency would get first preference. The pilot would complement the existing PGP Family Class stream and the Super Visa.
One of the reasons the pilot would be novel is that candidates under federal Express Entry-managed programs receive fewer points once they hit a certain age (a candidate gets no points for their age once they turn 45).
Under the Parents and Grandparents Human Capital Pilot, the federal government could welcome up to 2,750 principal applicants per year (the maximum number allowed under a pilot). This figure would likely be more in the neighbourhood of 3,500 parents and grandparents per year since a share of principal applicants would be accompanied by their spouses.
This idea may be unpopular since critics could argue the PGP exists to strengthen Canadian society, not its economy. But this pilot could at least expedite processing for individuals who meet its criteria and would reduce the number of applications submitted to the PGP, which would help to improve PGP processing times.
They way it is described with numbers seems it is internal news and coming as a parallel program to PGP.