What is Best Practice for Migrating Specific Dimensions from PBCS Test to Production?

Summary:

When creating snapshots, I can drill down to the Account artifact, but I cannot cherry pick the accounts that I actually want to move. I'd love to hear how the community handles specific dimension migration for production updates, and whether or not there is a process better than importing snapshots.

For example, in our test environment, we have different projects going on that are not ready for production while other dimensions are ready for the move. Additionally, we also have old/unused dimensions that clutter the test environment, and should not be moved to production. (These dimensions are tied to outdated reports and rules that were developed in test, so cleanup is a bit cumbersome...but we are working on it.)