TDTM is a feature of EDA that allows you to manage the automation and custom logic that runs when data is inserted, updated, or deleted. By disabling unnecessary code, such as trigger handlers or validation rules, you can improve the performance and speed of the data import, avoid errors or unwanted data creation, and reduce the risk of hitting governor limits12.
Disabling sharing rules using TDTM is not a recommended action, because sharing rules are not controlled by TDTM, but by the Salesforce security model. Sharing rules are used to grant additional access to records based on criteria or ownership. Disabling them may affect the visibility and accessibility of the imported data for the users34.
Changing the account model to Household is not a necessary action, because the account model is a preference that depends on how the university wants to organize its contacts and accounts. EDA supports both the Administrative and Household account models, and the import file already defines the Account information. Changing the account model may cause data loss or duplication, and require additional configuration and mapping5 .