The Spaniard also hinted that the man who could be inheriting his Europa League winners is the coach who won six pieces of silverware in his first stint as Blues boss - Jose Mourinho.
Benitez takes charge of his last Chelsea game on Sunday against sixth-placed Everton, with his side already guaranteed a top-four finish.
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"Cesar Azpilicueta is an international, David Luiz can play in a different position, Fernando Torres is stronger and more confident, and Oscar, [Eden] Hazard and [Juan] Mata are getting better every day."
Benitez led Chelsea to Europa League glory on Wednesday when they defeated Portuguese side Benfica courtesy of a last-minute Branislav Ivanovic goal.
"With some additions also the team will be better, so the new manager will have an easier task [of winning the title] because he will have more quality.
"Maybe the next manager will have some experience here too, so I do not need to give him any advice.
"We have been working hard so it will be a pity if we cannot guarantee top three," Benitez said. "The players know how important it is [to beat Everton]. I am sure we will be fine."