The Swans comfortably accounted for the Tigers, 21.12 (138) to 10.12 (72) in fine conditions at the SCG, having put the visitors away with a seven goalS to three third quarter.
The premiership winning mentor was delighted with the performances of of the talented trio in the run in to the pointy end of the season.
"Yeah, absolutely, getting guys back into the team - getting Amon Buchanan, Kennelly and Hall," he said.
"All three of them looked a lot sharper and a lot more like we know they can play.
"Obviously Hally with six, Tadhg's rebounding and Amon looked really sharp.It is good to have a really good win, but it is good to get players back in the side and playing really good footy."
Roos said that Hall, who has been battling with an ongoing groin problem, had greatly benefited from having missed two matches in the past five rounds.
The big man looked refreshed after missing last weekend's clash with West Coast and was back to his best form booting six goals - his biggest haul of the season.
He had 18 touches and 10 marks and once again provided the presence that has made him an All-Australian player for the past three seasons.
Roos admitted that Hall had performed above expectations against the Tigers.
"I think we thought maybe he would come back and (kick) two or three goals but to get six and look like he did tonight certainly was worthwhile," Roos said.
Roos said it was pivotal the co-captain was in form as the Swans try to launch another late-season surge.
"It is important, we need out best players playing well to give us our best chance," he said.
Roos felt that Hall was playing at about 90 per cent and said he would be pleased if he could maintain that level of fitness for the rest of the season.
"I think he really does not still have that sharp pace, but thankfully he had a really good level of fitness so he was able to run reasonably well for long distances. It is just that short spurt of speed that he really has (that is missing)."
The Swans forward line was humming against the men from Punt Road with Nick Davis booting four goals, Adam Schneider three majors and Ryan O'Keefe producing another strong performance.
"Hally is playing a lot closer to goal as well and that has probably helped our structure as it has meant that Mick (O'Loughlin) is up the ground and Ryan O'Keefe is our centre half-forward, so our structure has changed and has become a little less predictable,"
he said.
The feedback was also good on running backman Kennelly with the Irishman having endured a tough year and been sidelined twice with knee problems.
"It looked like he has really turned the corner, which is really important for us as well."