A lot of bunching is caused by drivers for TTC who don't give a rat ass and want to be Sunday drivers. Seen too many cases where supervisors and other drivers have bitch to these Sunday drivers who gives them the fingers.
Traffic lights don't help ROW service to the point, it slows service down.
Even if the lead X vehicle does only drop off, there will still be bunching one way or another.
The opposite for traffic priority will happen with Doug Ford now in charge at Queens Park. Watch for requests NOT to improve transit priority at traffic signals from Doug. From link:
Doug taking public transit? If it's not a photo op, forget it.Doug Ford complains that it takes him over an hour to drive from his house in Etobicoke to Queen’s Park. “That’s unacceptable,” he says.