But Heaslip, who played under Schmidt when he was in charge at Leinster, can already see the improvements.
"He's a stickler for detail and puts a lot of onus on players to know their stuff. You're playing with good players, you've got to trust guys to do a job," Heaslip, who appeared in two Lions Tests this summer, told the Irish Independent.
"There's too much going on, you can't worry about someone else not doing their thing. You can't have weak links in the chain. Rugby is one of the few last proper team sports.
"You've people like Mike Ross and Rob Kearney, polar opposites in terms of body shape and athletic abilities, but they're all buying into the same system and all have to be able to do their jobs.
"If one doesn't, at international or club level, you just don't have the time to be filling in and doing someone else's."