That's according to former Arsenal midfielder Stewart Robson.
Arsenal signed the Lacazette in July 2017 for a record fee in the club of £ 46.5 million.
The Frenchman scored 14 goals in the Premier League in his first season, settling well without sparking the world.
Pierre-Emerick Aubameyang was hired by the selection in January, surpassing the Lacazette rate, and the Frenchman cut an evil figure in north London.
The pair have since developed a good friendship on and off the field, and Lacazette is now being favored as the center-forward in the triumvirate top of the 4-3-3 formation of Unai Emery.
The 27-year-old has had three consecutive seasons of more than 20 Ligue 1 goals before joining Arsenal, but Robson has revealed that he has improved his overall playing, although he has not yet rediscovered his impressive performance.
"I watched a lot of Lacazette in Lyon and I know one or two other scouts went to see him," Robson told Love Sport.
"We all came back and came back: He scored goals, but he's a bit lazy and not sure if he did enough races.
"He did not hold the ball when he had his back to the goal."
After a season under Arsene Wenger, in which he adapted to the more physical English game and the reinvigoration of Emery's philosophies, Robson believes that Arsenal have a more complete player in their hands.
"I think he changed at Arsenal," continued the former Arsenal midfielder.
"He does better races, he's a better character than when he played for Lyon.
"He's a player I thought would probably leave Arsenal late last season and would not be wanted, but now he's a scorer and is looking for a real threat."
"Together with Aubameyang, they look like they could form a good partnership at some point."
Lacazette currently has five goals in the league, while Aubameyang only defeats his teammate in seven goals.