Let's not rewrite history here, go through the old threads and you will definitely see people complained about Mourinho's and Conte's ultra defensive approach in these big games. For example, let's not forget Mourinho decided to start parking the buss in the second half of the 2014/15 season while Conte once had the team go walkabout at Man City! There were also countless of away matches where Mourinho set up to play for a point and people complained because we could have done more.
It's all fine if Lampard wants to play this boring defensive football but just like Mourinho and Conte before him, he then needs to justify it with results. Otherwise, what's the difference between him and those ex-managers of ours?