On Monday afternoon, Roos had the far more palatable task of praising the 32-year-old after his six-disposal game against West Coast.
Hall had just one more possession against the Eagles on Saturday night, but his five extra goals and five fierce tackles had the Swans coach smiling.
“With 'Hally', what he’s probably got to keep focusing on is that physical stuff," Roos said.
“When guys are closer to the end [of their careers] than the start, sometimes they do tend to focus on things like marks, kicks and handballs.
“I think if he just keeps focusing on that chase and the tackle, he will be an impact player for us.
“We’re not too worried about how many goals he kicks. Provided he puts that pressure on every single week, he’s going to be a good player for us.”
Roos said Hall’s presence in the forward line lifted his teammates, and his impact was even greater when his defensive efforts reached the level shown against West Coast.
Eagle Shannon Hurn was on the end of one particularly strong tackle on the wing, while Hall’s desperation in a contest against David Wirrpanda resulted in a goal to Jarred Moore.
Roos said the likes of Hawthorn duo Lance Franklin and Jarryd Roughead, Port Adelaide’s Warren Tredrea and Brisbane Lion Jonathan Brown had shown how important that defensive pressure could be.
“If you’ve got a big power forward that tackles and chases, it does make the guys around them nervous,” he said.
“It doesn’t matter who they are because they’re big, strong, powerful guys, and all those guys are quick too.
“You can also hear them coming, so that doesn’t hurt either.”
