MDM to Syncronize Suppliers Master, Materials Master and Service Masters

I'm in charge of MDM in a big Holding, today we have custom systems to ensure the quality of these masters and synchronize between them.

In the tree scenarios (Materials, Suppliers, Services) we have a content approval workflow and tools to improve content's quality. Apart from this we synchronize the content with tree SAP R/3 and with other systems.

We have a lot of problems with the backend field's validations, for example, when I synchronize a Supplier that is from USA the R/3 validates the NIF number format (from customizing settings), but our application maybe has another validation and the supplier is rejected by R/3.

My Questions are:

Can MDM manage approval workflows per each master data with different roles?

Can MDM synchronize Masters Validations from customizing? To avoid differences between MDM’s validations.

Is possible with MDM improve the materials content? With for example some custom business’ rules.

I'm sorry my English, I hope that this was clear.

Thanks in advance,

Best regards,