The Spaniard recorded the first Barclays Premier League victory of his interim reign at Stamford Bridge on Saturday when the Blues followed up their 6-1 Champions League demolition of Nordsjaelland with a 3-1 victory at Sunderland.
Perhaps significantly, Fernando Torres, who established himself as one of the top frontmen in the world under his compatriot during their time together at Liverpool, added two more goals to the double he claimed in midweek to announce his return to form.
Benitez was quick to point out that the £50million striker's resurrection has gone hand in hand with a general improvement by the team, and he is confident there is more to come as he and he players head for the Far East and the FIFA Club World Cup.
He said: "The team still can improve, so it's a question of time.
"Training sessions before games, you have just two or three sessions and you cannot improve everything that you want to improve.
"But we will have more time, maybe, in Japan, three days in the hotel. We can talk, we can analyse more things and little by little, they will get to the level at which we want to see them."
Benitez, of course, knows the Club World Cup tournament well having taken Liverpool to the final in 2005 and won it with Inter Milan five years later.
Chelsea will face Mexican outfit CF Monterrey in Yokohama on Thursday and then the final or the third-place play off at the same venue on Sunday before heading home.
Benitez said: "It's important always to have these opportunities to win any trophy, and especially a trophy like this one.
"We played the final in Japan in 2005, we won two years ago. It was a great experience for me and hopefully it will be a great experience for our players.
"It will be a fantastic experience. Yes, we are concerned because we know it will be very difficult, but we are working very hard trying to organise everything properly.
"Maybe it will not be ideal because you don't have too much time and you have to go and you have to play a game in three days' time.
"But we will try to do our best, obviously. It's not easy. The doctor and the fitness coaches are a little bit crazy now, but we will try to do our best."
Chelsea headed for Japan after Saturday's game, but did so with midfielder Oriol Romeu on his way back to London to have the knee injury he suffered at the Stadium of Light assessed.
That was one of few disappointments for Benitez on a day when his side might have established an unassailable lead in a blistering start, and then did so by the 49th minute before having to weather a late fightback.
The visitors could have been 4-0 up inside 11 minutes, and might also have been facing 10 men after Black Cats midfielder Sebastian Larsson was fortunate to survive after pulling back Eden Hazard as he raced in on goal with only two minutes played.
However, they went in front when Torres started and finished a flowing move, and they doubled their advantage in first-half injury time when the Spain international converted a penalty - his first in the Premier League - after Ramires had been felled by Larsson.
Juan Mata made it 3-0 from close range after Torres' 49th-minute shot came back off the woodwork, and although Adam Johnson pulled a goal back with a 66th-minute strike and Craig Gardner hit the bar at the death, the points were safe.
There was further good news for Benitez when Frank Lampard appeared as a 79th-minute replacement for Hazard after his recovery from a calf injury, and the England international was delighted to be back.
Lampard told Chelsea TV: "I felt fine. I had to be careful this time because of a recurrence I had last time, and even though I have been desperate to get back, I have been putting in the hours in the gym to make sure it's got a strong base.
"From now, I should be fit, touch wood. It's all good with it."
Torres feels he is benefiting from a more direct approach under Benitez, telling the club's website: "We are playing a bit differently.
"We don't pass the ball as much as we did before in the final third of the pitch and we try to play more direct and explode the players forward with Victor Moses or me or Eden Hazard on the left.
"We are using the quality of Oscar or Mata in the middle and we are attacking more and making more chances.
"We are working as a team, as we did in the beginning of the season with Robbie [Di Matteo], but normally it takes some time when a new manager arrives and changes things like this, but the results last Wednesday and on Saturday are going to give us more confidence, the only thing we need now."
Benitez has not been a popular figure with some Chelsea fans since taking over from Di Matteo, but Torres added: "We had a very bad run of results in November and we knew we needed to improve, and we have to support now the manager.
"It is a difficult situation for him but with the results everything is going to be easier.
"It was a long time for me not scoring in the Premier League but coming after two goals three days before in the Champions League, I am very happy to get back to scoring, especially as the team starts winning."