[otrs] ITSM 2.0.2 functionality

Hi I am currently running OTRS 2.4.7 ITSM 2.0.2, but I didn't install some packages like: ITSMIncidentProblemManagement 2.0.2 ITSMServiceLevelManagement 2.0.2 ITSM 2.0.2 Am I loosing any functionalities? Thanks in advance Sergio