I actually took a ride on the 772 on Friday (needed something to do on my day off), along the route, we picked up zero people (during the rush) between Bergen CC & Bergenfield, got maybe 4 people after that, didn't pick up anyone until Hackensack where everyone who was already on got off, then 2 people got off at Little Ferry and the didn't pick up anyone all the way to Rutherford.
On the trip back towards Hackensack, no one got on/off along Gotham Pkwy, Commerce Blvd, or Moonachie and it was like that the rest of the day.
What I would do with the 772 on weekdays is have the 772G only run via Gotham Pkwy during rush hours only or on request towards Rutherford.
That is also not the most direct route, buses can go straight down Washington Av to Route 120 and then go across to the Complex to skip Gotham Pkwy.