Head coach Michael Maguire will stay on and complete the third year of his tenure after he led the Broncos to a premiership in 2025, then 14th place this year.
The stunning fall from grace was due to a variety of factors, but key was the defensive collapse, where the Broncos conceded 677 points, their worst since 2021 when they let in 695 points.
The 2020 wooden-spoon season, just 20 games due to COVID, remains the lowest in points per match conceded with 31.2, but this year's 28.2 was also unacceptable.
The Broncos lacked a regular defensive coach after Ben Te'o resigned early in the season after disagreements with Maguire.
Manly's 2011 premiership winner and Queensland assistant coach Ballin, already on staff as an assistant and highly respected for his talents overall in the coaching space, will take charge of making sure Brisbane's defensive structures are secure.
Broncos CEO Dave Donaghy informed club members on Friday of the review results in a lengthy letter.
"We will invest further in our coaching and development resources, supporting our head coach Michael Maguire, who last year became only the second coach in our club's history to win a premiership," Donaghy said.
"Trent Barrett will continue as attack coach and Matt Ballin will assume responsibility for defence.
"Adam Brideson remains as a development coach and will be supported by another coach in this space, such is its importance to preparing our players for the rigours of the NRL."
In his letter Donaghy said the club reviewed good years and bad.
"When it became clear that we wouldn't play finals this season, we commenced a detailed review of our football program - to understand what worked, what didn't and the controllable and uncontrollable factors that impacted our season," he said.
Donaghy outlined "five priority areas" to ensure the club would "bounce back strongly in 2027".
Football leadership was one area, with current general manager of the NRL program Troy Thomson becoming executive general manager of football.
Donaghy said that would provide "greater alignment across our NRL, pathway and development programs".
The beefed-up coaching resources will be complemented by an upgraded investment in the academy program.
"With expansion to 20 clubs and continued growing competition in our own backyard, we want to ensure our staff are equipped to take the fight up head on," Donaghy said.
The club's pre-season preparation will be realigned, with less long-distance travel. That was necessary last year with the Broncos playing in the World Club Challenge, but a lengthy pre-season training camp in Toowoomba was also not received well by several players and staff.
"Our priority for the 2027 pre-season, though, will be to limit travel to within Australia and New Zealand," Donaghy said.
"The objective is to give our players and coaches the best possible preparation for next year's season-opener."
The final area Donaghy addressed was the woeful record at Suncorp Stadium, where the Broncos lost 12 of 14 games.
"An obvious area we need to improve," he said.
