We are an Enterprise customer that works within a very structured IT department utilizing many SFDC instances (6-7) for various projects at once. Therefore, it would be great to partition a cloned instance of Marketo where all programs, partitions, etc. are all present to prepare for synchronization with a new salesforce instance.
I think that you should be able to coordinate something like that between your Premier Support Marketo team and their engineering department. However, I am sure, that needs to be arranged somehow with the contract you have with Marketo. I am sure that you could get Marketo to partner with your enterprise and meet your goals.