If Lampard is not able make his sides defensively solid or at least defensively competent, then he is not going to achieve anything in his career, never mind here. If he can't sort it out himself, then get a defensive coach!
IMO, I want to see us defend properly, defend with nous and competency and I don't mean it has to be defensive or pragmatic but defend with good organization like we did under Conte/Mourinho. That our defenders aren't great and need to be upgraded is well documented but I don't believe for one second that they could haven't been coached or drilled better defensively this season. So many of these players played under Sarri last season, for example, and we conceded less goals. Some times, I can't help but wonder if we don't do much defensive work in training at all under Lampard and that the players are just left to their own devices for matches. We some times don't mark players, we some times leave spaces unmarked for players to attack, we some times don't close down spaces etc. PLUS more often than not, whenever we have the ball, pretty much everyone bar the 2 CBs get ahead of the ball with little regard of counter attacks when we lose the ball, which happens a lot and this comes from how the manager sets the team up. It's little wonder why our matches have tended to be like basketball games, why we have conceded so many goals from counter attacks this season, why we have always looked so exposed etc. We won't get anywhere if this continues next season.