IIRC correctly, I posted this link to the City's policy that covers naming and renaming parks back when SUV first posted a suggestion on changing the name of Doug Sr. park:
http://atabase.org/Corp honourific-policy.pdf. Anyone working up a cover letter for a petition (or two to three...) should take a look at it.
What I have not been able to find on-line is the declaration or council resolution or whatever from when the Doug Ford Jr. name was adopted. That might say what the supposed reasons were - which might be useful in plumping for a change (e.g., if it could be argued that some of the supposed reasons have been discredited by more recent events involving his progeny).