Under the leadership of interim manager Guus Hiddink, Chelsea have put a poor start to the season behind them.
Former England international Lampard, however, who played more than 400 games for the club between 2001 and 2014, sees John Terry as the last of the influential characters at Stamford Bridge.
He told the Mail on Sunday: “I do worry about where the real personalities of the team are. To be a big team, you have to have big personalities.
“I don’t want to sound like I am harking back to the days of me and John (Terry) and Ashley Cole and Petr Cech and Didier Drogba, but I do see a team now where John is the last mainstay of that identity.
“Maybe Chelsea are looking for a more beautiful way now. The club has been trying to push it down that route with the players they have recruited over the last four or five years.
“The problem is if you fall in the middle, somewhere between tough and beautiful. It’s nice football at times but it’s not that nice and it’s not really winning games. It’s not beautiful, beautiful stuff.
“They need to buy two or three big players. Because being 11th in the Premier League is ridiculous for Chelsea.”